Bug 38892 ASTRewrite should support copying nodes more than once.
M1 Try is result currently in an exception: org.eclipse.jdt.internal.corext.Assert$AssertionFailedException: assertion failed; Node used as more than one copy source at java.lang.Throwable.<init>(Throwable.java) at java.lang.Throwable.<init>(Throwable.java) at org.eclipse.jdt.internal.corext.Assert$AssertionFailedException.<init> (Assert.java:55) at org.eclipse.jdt.internal.corext.Assert.isTrue(Assert.java:136) at org.eclipse.jdt.internal.corext.dom.ASTRewrite.createCopy (ASTRewrite.java:289)
org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/ui/tests/astrewrite/ASTRewritingTypeDeclTest.java
buf.append("public class E extends Exception implements Runnable, Serializable {\n");
		buf.append("    public static class EInner {\n");
		buf.append("        public void xee() {\n");
		buf.append("        }\n");		
		buf.append("    }\n");		
		buf.append("    private int i;\n");	
		buf.append("    private int k;\n");	
		buf.append("    public E() {\n");
		buf.append("    }\n");
		buf.append("    public void gee() {\n");
		buf.append("    }\n");
		buf.append("    public void hee() {\n");
		buf.append("    }\n");
		buf.append("}\n");
		buf.append("class F implements Runnable {\n");
		buf.append("    public void foo() {\n");
		buf.append("    }\n");		
		buf.append("}\n");
		buf.append("interface G {\n");
		buf.append("}\n");		
		ICompilationUnit cu= pack1.createCompilationUnit("E.java", buf.toString(), false, null);			
		CompilationUnit astRoot= AST.parseCompilationUnit(cu, false);
		ASTRewrite rewrite= new ASTRewrite(astRoot);
		AST ast= astRoot.getAST();
		{ 
			TypeDeclaration type= findTypeDeclaration(astRoot, "E");
			
			
			TypeDeclaration modifiedNode= ast.newTypeDeclaration();
			modifiedNode.setInterface(true);