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/ReorgQuickFixTest.java
public void testAddToClasspathContainer() throws Exception {
		IPackageFragment pack1= fSourceFolder.createPackageFragment("test1", false, null);
		StringBuffer buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("import mylib.Foo;\n");
		buf.append("public class E {\n");
		buf.append("}\n");
		ICompilationUnit cu= pack1.createCompilationUnit("E.java", buf.toString(), false, null);
		IClasspathEntry[] prevClasspath= cu.getJavaProject().getRawClasspath();
		
		IJavaProject otherProject= JavaProjectHelper.createJavaProject("other", "bin");
		try {
			File lib= JavaTestPlugin.getDefault().getFileInPlugin(JavaProjectHelper.MYLIB);
			assertTrue("lib does not exist",  lib != null && lib.exists());
			IPath path= Path.fromOSString(lib.getPath());
			final IClasspathEntry[] entries= { JavaCore.newLibraryEntry(path, null, null) };
			final IPath containerPath= new Path(JavaCore.USER_LIBRARY_CONTAINER_ID).append("MyUserLibrary");
			
			IClasspathContainer newContainer= new IClasspathContainer() {
				public IClasspathEntry[] getClasspathEntries() {
					return entries;
				}
				public String getDescription() {
					return "MyUserLibrary";
				}
				public int getKind() {
					return IClasspathContainer.K_APPLICATION;
				}
				public IPath getPath() {
					return containerPath;