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
public void testCorrectReturnStatementForArray() throws Exception {
		IPackageFragment pack1= fSourceFolder.createPackageFragment("test1", false, null);
		StringBuffer buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("public class E {\n");
		buf.append("    public int[][] getArray() {\n");
		buf.append("        return;\n");
		buf.append("    }\n");
		buf.append("}\n");
		ICompilationUnit cu= pack1.createCompilationUnit("E.java", buf.toString(), false, null);
		
		CompilationUnit astRoot= getASTRoot(cu);
		ArrayList proposals= collectCorrections(cu, astRoot);
		assertNumberOfProposals(proposals, 2);
		assertCorrectLabels(proposals);
		
		ASTRewriteCorrectionProposal proposal= (ASTRewriteCorrectionProposal) proposals.get(0);
		String preview1= getPreviewContent(proposal);
		buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("public class E {\n");
		buf.append("    public int[][] getArray() {\n");
		buf.append("        return null;\n");
		buf.append("    }\n");
		buf.append("}\n");
		String expected1= buf.toString();
		
		proposal= (ASTRewriteCorrectionProposal) proposals.get(1);
		String preview2= getPreviewContent(proposal);
		buf= new StringBuffer();