code: public ConstructorNode getDeclaredConstructor(Parameter[] parameters) {
          for (ConstructorNode method : getDeclaredConstructors()) {
              if (parametersEqual(method.getParameters(), parameters)) {
                  return method;
              }
          }
          return null;
      }
docs: Finds a constructor matching the given parameters in this class.
  
  @return the constructor matching the given parameters or null