Bug 76530 [options] Warn about unused local variables and private members
I think we should warn about unused local variables and unused private members by default. These things are errors akin to unused imports, which we already warn about.
org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/ui/tests/quickfix/UnresolvedMethodsQuickFixTest.java
buf.append("public class E {\n");
		buf.append("    public void foo(int i) {\n");
		buf.append("        long x= 0;\n");
		buf.append("        foo(x + 1);\n");
		buf.append("    }\n");
		buf.append("\n");
		buf.append("    private void foo(long l) {\n");
		buf.append("    }\n");		
		buf.append("}\n");
		String expected2= buf.toString();
		proposal= (CUCorrectionProposal) proposals.get(2);
		String preview3= getPreviewContent(proposal);
		buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("public class E {\n");
		buf.append("    public void foo(long l) {\n");
		buf.append("        long x= 0;\n");
		buf.append("        foo(x + 1);\n");
		buf.append("    }\n");
		buf.append("}\n");
		String expected3= buf.toString();
		
		assertEqualStringsIgnoreOrder(new String[] { preview1, preview2, preview3 }, new String[] { expected1, expected2, expected3 });		
	}
	
	public void testParameterMismatchCast2() throws Exception {
		IPackageFragment pack1= fSourceFolder.createPackageFragment("test1", false, null);
		StringBuffer buf= new StringBuffer();
				
		buf= new StringBuffer();