code: public MethodDocImpl findMethod(String methodName, String[] paramTypes) {
          // Use hash table 'searched' to avoid searching same class twice.
          //### It is not clear how this could happen.
          return searchMethod(methodName, paramTypes, new HashSet<ClassDocImpl>());
      }
docs: Find a method in this class scope.
  Search order: this class, interfaces, superclasses, outerclasses.
  Note that this is not necessarily what the compiler would do!
  
  @param methodName the unqualified name to search for.
  @param paramTypes the array of Strings for method parameter types.
  @return the first MethodDocImpl which matches, null if not found.