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diff --git a/src/net/sourceforge/plantuml/cucadiagram/Magma.java b/src/net/sourceforge/plantuml/cucadiagram/Magma.java
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+/* ========================================================================
+ * PlantUML : a free UML diagram generator
+ * ========================================================================
+ *
+ * (C) Copyright 2009-2014, Arnaud Roques
+ *
+ * Project Info:  http://plantuml.sourceforge.net
+ * 
+ * This file is part of PlantUML.
+ *
+ * Licensed under The MIT License (Massachusetts Institute of Technology License)
+ * 
+ * See http://opensource.org/licenses/MIT
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+ * IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ *
+ * Original Author:  Arnaud Roques
+ */
+package net.sourceforge.plantuml.cucadiagram;
+
+import java.util.List;
+
+class Magma {
+
+	private final CucaDiagram system;
+	private final List<ILeaf> standalones;
+	private final LinkType linkType = new LinkType(LinkDecor.NONE, LinkDecor.NONE).getInvisible();
+
+	public Magma(CucaDiagram system, List<ILeaf> standalones) {
+		this.system = system;
+		this.standalones = standalones;
+	}
+
+	public void putInSquare() {
+		final SquareLinker<ILeaf> linker = new SquareLinker<ILeaf>() {
+			public void topDown(ILeaf top, ILeaf down) {
+				system.addLink(new Link(top, down, linkType, null, 2));
+			}
+
+			public void leftRight(ILeaf left, ILeaf right) {
+				system.addLink(new Link(left, right, linkType, null, 1));
+			}
+		};
+		new SquareMaker<ILeaf>().putInSquare(standalones, linker);
+	}
+
+	public IGroup getContainer() {
+		final IGroup parent = standalones.get(0).getParentContainer();
+		if (parent == null) {
+			return null;
+		}
+		return parent.getParentContainer();
+	}
+
+	public boolean isComplete() {
+		final IGroup parent = getContainer();
+		if (parent == null) {
+			return false;
+		}
+		return parent.size() == standalones.size();
+	}
+
+	private int squareSize() {
+		return SquareMaker.computeBranch(standalones.size());
+	}
+
+	private ILeaf getTopLeft() {
+		return standalones.get(0);
+	}
+
+	private ILeaf getBottomLeft() {
+		int result = SquareMaker.getBottomLeft(standalones.size());
+		return standalones.get(result);
+	}
+
+	private ILeaf getTopRight() {
+		final int s = squareSize();
+		return standalones.get(s - 1);
+	}
+
+	@Override
+	public String toString() {
+		return standalones.get(0).getParentContainer() + " " + standalones.toString() + " " + isComplete();
+	}
+
+	public void linkToDown(Magma down) {
+		system.addLink(new Link(this.getBottomLeft(), down.getTopLeft(), linkType, null, 2));
+
+	}
+
+	public void linkToRight(Magma right) {
+		system.addLink(new Link(this.getTopRight(), right.getTopLeft(), linkType, null, 1));
+	}
+
+}