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diff --git a/doc/helm-figures/helm-source-ffiles.svg b/doc/helm-figures/helm-source-ffiles.svg
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+<?xml version="1.0" encoding="UTF-8" standalone="no"?><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" contentScriptType="application/ecmascript" contentStyleType="text/css" height="644px" preserveAspectRatio="none" style="width:390px;height:644px;" version="1.1" viewBox="0 0 390 644" width="390px" zoomAndPan="magnify"><defs><filter height="300%" id="f18kavn37g7zw" width="300%" x="-1" y="-1"><feGaussianBlur result="blurOut" stdDeviation="2.0"/><feColorMatrix in="blurOut" result="blurOut2" type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .4 0"/><feOffset dx="4.0" dy="4.0" in="blurOut2" result="blurOut3"/><feBlend in="SourceGraphic" in2="blurOut3" mode="normal"/></filter></defs><g><text fill="#000000" font-family="sans-serif" font-size="18" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="240" x="78.5" y="16.708">Parents and Children of</text><text fill="#000000" font-family="sans-serif" font-size="18" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="194" x="101.5" y="37.6611">'helm-source-ffiles'</text><text fill="#000000" font-family="sans-serif" font-size="18" lengthAdjust="spacingAndGlyphs" textLength="0" x="201.5" y="58.6143"/><text fill="#000000" font-family="sans-serif" font-size="18" lengthAdjust="spacingAndGlyphs" textLength="0" x="201.5" y="79.5674"/><!--MD5=[29825b4f2a07190321f66d6028a4dd26]
+class helm-source-sync--><rect fill="#FEFECE" filter="url(#f18kavn37g7zw)" height="48" id="helm-source-sync" style="stroke: #A80036; stroke-width: 1.5;" width="156" x="20" y="199.8125"/><ellipse cx="35" cy="215.8125" fill="#ADD1B2" rx="11" ry="11" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M37.9688,221.4531 Q37.3906,221.75 36.75,221.8906 Q36.1094,222.0469 35.4063,222.0469 Q32.9063,222.0469 31.5781,220.4063 Q30.2656,218.75 30.2656,215.625 Q30.2656,212.5 31.5781,210.8438 Q32.9063,209.1875 35.4063,209.1875 Q36.1094,209.1875 36.75,209.3438 Q37.4063,209.5 37.9688,209.7969 L37.9688,212.5156 Q37.3438,211.9375 36.75,211.6719 Q36.1563,211.3906 35.5313,211.3906 Q34.1875,211.3906 33.5,212.4688 Q32.8125,213.5313 32.8125,215.625 Q32.8125,217.7188 33.5,218.7969 Q34.1875,219.8594 35.5313,219.8594 Q36.1563,219.8594 36.75,219.5938 Q37.3438,219.3125 37.9688,218.7344 L37.9688,221.4531 Z "/><text fill="#000000" font-family="sans-serif" font-size="12" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="124" x="49" y="219.9668">helm-source-sync</text><line style="stroke: #A80036; stroke-width: 1.5;" x1="21" x2="175" y1="231.8125" y2="231.8125"/><line style="stroke: #A80036; stroke-width: 1.5;" x1="21" x2="175" y1="239.8125" y2="239.8125"/><!--MD5=[4700ddfab9e311ad1ae5061cdd5496ba]
+class helm-source-ffiles--><rect fill="#FEFECE" filter="url(#f18kavn37g7zw)" height="325.7031" id="helm-source-ffiles" style="stroke: #A80036; stroke-width: 1.5;" width="184" x="6" y="307.8125"/><ellipse cx="32.25" cy="323.8125" fill="#ADD1B2" rx="11" ry="11" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M35.2188,329.4531 Q34.6406,329.75 34,329.8906 Q33.3594,330.0469 32.6563,330.0469 Q30.1563,330.0469 28.8281,328.4063 Q27.5156,326.75 27.5156,323.625 Q27.5156,320.5 28.8281,318.8438 Q30.1563,317.1875 32.6563,317.1875 Q33.3594,317.1875 34,317.3438 Q34.6563,317.5 35.2188,317.7969 L35.2188,320.5156 Q34.5938,319.9375 34,319.6719 Q33.4063,319.3906 32.7813,319.3906 Q31.4375,319.3906 30.75,320.4688 Q30.0625,321.5313 30.0625,323.625 Q30.0625,325.7188 30.75,326.7969 Q31.4375,327.8594 32.7813,327.8594 Q33.4063,327.8594 34,327.5938 Q34.5938,327.3125 35.2188,326.7344 L35.2188,329.4531 Z "/><text fill="#000000" font-family="sans-serif" font-size="12" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="127" x="48.75" y="327.9668">helm-source-ffiles</text><line style="stroke: #A80036; stroke-width: 1.5;" x1="7" x2="189" y1="339.8125" y2="339.8125"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="17" x="12" y="370.8276">init</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="34" x="12" y="383.6323">action</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="107" x="12" y="396.437">action-transformer</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="79" x="12" y="409.2417">after-init-hook</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="89" x="12" y="422.0464">before-init-hook</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="131" x="12" y="434.8511">candidate-number-limit</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="62" x="12" y="447.6558">candidates</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="44" x="12" y="460.4604">cleanup</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="172" x="12" y="473.2651">filtered-candidate-transformer</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="33" x="12" y="486.0698">group</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="76" x="12" y="498.8745">header-name</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="81" x="12" y="511.6792">help-message</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="44" x="12" y="524.4839">keymap</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="79" x="12" y="537.2886">match-on-real</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="46" x="12" y="550.0933">migemo</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="56" x="12" y="562.8979">mode-line</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="62" x="12" y="575.7026">nohighlight</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="107" x="12" y="588.5073">persistent-action-if</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="86" x="12" y="601.312">persistent-help</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="39" x="12" y="614.1167">update</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="40" x="12" y="626.9214">volatile</text><line style="stroke: #A80036; stroke-width: 1.5;" x1="7" x2="34.5" y1="354.2148" y2="354.2148"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="127" x="34.5" y="357.5229">some interesting slots</text><line style="stroke: #A80036; stroke-width: 1.5;" x1="161.5" x2="189" y1="354.2148" y2="354.2148"/><!--MD5=[8da85e6ec6935d54267014e974a66b51]
+class helm-source--><rect fill="#FEFECE" filter="url(#f18kavn37g7zw)" height="48" id="helm-source" style="stroke: #A80036; stroke-width: 1.5;" width="119" x="38.5" y="91.8125"/><ellipse cx="53.5" cy="107.8125" fill="#ADD1B2" rx="11" ry="11" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M56.4688,113.4531 Q55.8906,113.75 55.25,113.8906 Q54.6094,114.0469 53.9063,114.0469 Q51.4063,114.0469 50.0781,112.4063 Q48.7656,110.75 48.7656,107.625 Q48.7656,104.5 50.0781,102.8438 Q51.4063,101.1875 53.9063,101.1875 Q54.6094,101.1875 55.25,101.3438 Q55.9063,101.5 56.4688,101.7969 L56.4688,104.5156 Q55.8438,103.9375 55.25,103.6719 Q54.6563,103.3906 54.0313,103.3906 Q52.6875,103.3906 52,104.4688 Q51.3125,105.5313 51.3125,107.625 Q51.3125,109.7188 52,110.7969 Q52.6875,111.8594 54.0313,111.8594 Q54.6563,111.8594 55.25,111.5938 Q55.8438,111.3125 56.4688,110.7344 L56.4688,113.4531 Z "/><text fill="#000000" font-family="sans-serif" font-size="12" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="87" x="67.5" y="111.9668">helm-source</text><line style="stroke: #A80036; stroke-width: 1.5;" x1="39.5" x2="156.5" y1="123.8125" y2="123.8125"/><line style="stroke: #A80036; stroke-width: 1.5;" x1="39.5" x2="156.5" y1="131.8125" y2="131.8125"/><path d="M225.5,458.3125 L225.5,466.8125 L190.04,470.8125 L225.5,474.8125 L225.5,483.4453 A0,0 0 0 0 225.5,483.4453 L378.5,483.4453 A0,0 0 0 0 378.5,483.4453 L378.5,468.3125 L368.5,458.3125 L225.5,458.3125 A0,0 0 0 0 225.5,458.3125 " fill="#FBFB77" filter="url(#f18kavn37g7zw)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M368.5,458.3125 L368.5,468.3125 L378.5,468.3125 L368.5,458.3125 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="132" x="231.5" y="475.3794">helm-source-ffiles</text><!--MD5=[016784bd64bc0242128ed351709a683a]
+reverse link helm-source-sync to helm-source-ffiles--><path d="M98,268.1725 C98,279.9425 98,293.4325 98,307.7125 " fill="none" id="helm-source-sync&lt;-helm-source-ffiles" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="none" points="91,267.8625,98,247.8625,105,267.8625,91,267.8625" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[7fac0f6d78841877506d9722364fbb5e]
+reverse link helm-source to helm-source-sync--><path d="M98,159.8325 C98,173.3925 98,187.8525 98,199.4925 " fill="none" id="helm-source&lt;-helm-source-sync" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="none" points="91,159.8125,98,139.8125,105,159.8125,91,159.8125" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[7e406830ebea7a2408e31f70600fe4e1]
+@startuml
+skinparam classFontStyle bold
+skinparam captionFontStyle bold
+title **Parents and Children of**\n**'helm-source-ffiles'**\n\n
+"helm-source-sync" <|- - "helm-source-ffiles"
+class "helm-source-sync"
+"helm-source" <|- - "helm-source-sync"
+class "helm-source"
+class "helm-source-ffiles" {
+	__ some interesting slots __
+	init
+	action
+	action-transformer
+	after-init-hook
+	before-init-hook
+	candidate-number-limit
+	candidates
+	cleanup
+	filtered-candidate-transformer
+	group
+	header-name
+	help-message
+	keymap
+	match-on-real
+	migemo
+	mode-line
+	nohighlight
+	persistent-action-if
+	persistent-help
+	update
+	volatile
+}
+note right of "helm-source-ffiles"
+	**helm-source-ffiles**
+end note
+@enduml
+
+PlantUML version 1.2020.02(Sun Mar 01 15:52:07 IST 2020)
+(GPL source distribution)
+Java Runtime: OpenJDK Runtime Environment
+JVM: OpenJDK 64-Bit Server VM
+Java Version: 11.0.11-ea+8-post-Debian-1
+Operating System: Linux
+Default Encoding: UTF-8
+Language: en
+Country: IN
+--></g></svg>
+\ No newline at end of file