Bug 91081 [quick fix] Quick complete should introspect method change when return val from method
org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/ui/tests/quickfix/ReturnTypeQuickFixTest.java
boolean addReturnType= true, doRename= true;
		
		for (int i= 0; i < proposals.size(); i++) {
			Object elem= proposals.get(i);
			if (elem instanceof ASTRewriteCorrectionProposal) {
				ASTRewriteCorrectionProposal proposal= (ASTRewriteCorrectionProposal) elem;
				assertTrue("duplicated entries", addReturnType);
				addReturnType= false;		
		
				String preview= getPreviewContent(proposal);
		
				buf= new StringBuffer();
				buf.append("package test1;\n");
				buf.append("import java.util.Enumeration;\n");		
				buf.append("import java.util.Vector;\n");
				buf.append("public class E {\n");
				buf.append("    public Enumeration foo() {\n");
				buf.append("        return (new Vector()).elements();\n");
				buf.append("    }\n");
				buf.append("}\n");
				assertEqualString(preview, buf.toString());
			} else {
				assertTrue("duplicated entries", doRename);
				doRename= false;
				
				CUCorrectionProposal proposal= (CUCorrectionProposal) elem;
				String preview= getPreviewContent(proposal);
				buf= new StringBuffer();
				buf.append("package test1;\n");