class Protobuf::Rpc::Service

def self.implemented_services

code
An array of defined service classes that contain implementation 
def self.implemented_services
  classes = (self.subclasses || []).select do |subclass|
    subclass.rpcs.any? do |(name, method)|
      subclass.method_defined? name
    end
  end
  classes.map &:name
end