code: public final ImmutableList<Parameter> getParameters() {
      Type[] parameterTypes = getGenericParameterTypes();
      Annotation[][] annotations = getParameterAnnotations();
      AnnotatedType[] annotatedTypes = getAnnotatedParameterTypes();
      ImmutableList.Builder<Parameter> builder = ImmutableList.builder();
      for (int i = 0; i < parameterTypes.length; i++) {
        builder.add(
            new Parameter(
                this, i, TypeToken.of(parameterTypes[i]), annotations[i], annotatedTypes[i]));
      }
      return builder.build();
    }
docs: Returns all declared parameters of this {@code Invokable}. Note that if this is a constructor
  of a non-static inner class, unlike {@link Constructor#getParameterTypes}, the hidden {@code
  this} parameter of the enclosing class is excluded from the returned parameters.