ServiceResolver.java 文件源码

private MethodDescriptor resolveServiceMethod(
    String serviceName, String methodName, String packageName) {
  ServiceDescriptor service = findService(serviceName, packageName);
  MethodDescriptor method = service.findMethodByName(methodName);
  if (method == null) {
    throw new IllegalArgumentException(
        "Unable to find method " + methodName + " in service " + serviceName);
  }
  return method;
}