Bug 120544 [build path] Editing external source folder does not persist
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/CPListElement.java
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package org.eclipse.jdt.internal.ui.wizards.buildpaths;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.jdt.core.ClasspathContainerInitializer;
import org.eclipse.jdt.core.IAccessRule;
import org.eclipse.jdt.core.IClasspathAttribute;
import org.eclipse.jdt.core.IClasspathContainer;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.internal.corext.Assert;
import org.eclipse.jdt.internal.corext.util.JavaModelUtil;
import org.eclipse.jdt.launching.JavaRuntime;
import org.eclipse.jdt.internal.ui.JavaPlugin;
public class CPListElement {
	
	public static final String SOURCEATTACHMENT= "sourcepath"; 
	public static final String OUTPUT= "output"; 
	public static final String EXCLUSION= "exclusion"; 
	public static final String INCLUSION= "inclusion";