code: public MethodDeclaration getMethod(String name, String signature) {
      for (EntityDeclaration node : type.getMembers()) {
        if (node.getEntityType() == EntityType.METHOD) {
          MethodDeclaration method = (MethodDeclaration) node;
          if (method.getName().equals(name) && signature.equals(signature(method))) {
            return method;
          }
        }
      }
      return null;
    }
docs: Returns the Procyon method definition for a specified method,
  or null if not found.