code: public static final void assertMethodsNotUsed(final File classesDir, final FileFilter filter, final List<MCAMethod> methodsToFind) {
  
          Utils4J.checkNotNull("classesDir", classesDir);
          Utils4J.checkValidDir(classesDir);
          Utils4J.checkNotNull("methodsToFind", methodsToFind);
  
          final MethodCallAnalyzer analyzer = new MethodCallAnalyzer(methodsToFind);
          analyzer.findCallingMethodsInDir(classesDir, filter);
  
          final List<MCAMethodCall> methodCalls = analyzer.getMethodCalls();
          if (methodCalls.size() > 0) {
              final StringBuilder sb = new StringBuilder("Illegal method call(s) found:");
              for (final MCAMethodCall methodCall : methodCalls) {
                  sb.append("\n");
                  sb.append(methodCall);
              }
              Assert.fail(sb.toString());
          }
  
      }
docs: Asserts that a set of methods is not used.
  
  @param classesDir
  Directory with the ".class" files to check - Cannot be <code>null</code> and must be a valid directory.
  @param filter
  File filter or NULL (process all '*.class' files).
  @param methodsToFind
  List of methods to find - Cannot be NULL.