class Protobuf::Rpc::Service

def method_added(old)

most notably calling call_rpc against the method. See call_rpc for more info.
We want to remap the method such that we can wrap it in before and after behavior,
or it isn't in the reserved method list (NON_RPC_METHODS),
If the method isn't already a private instance method, or it doesn't start with rpc_,
Override methods being added to the class 
def method_added(old)
  new_method = :"rpc_#{old}"
  return if private_instance_methods.include?(new_method) or old =~ /^rpc_/ or NON_RPC_METHODS.include?(old.to_s)
  
  alias_method new_method, old
  private new_method
  
  define_method(old) do |pb_request|
    call_rpc(old.to_sym, pb_request)
  end
rescue ArgumentError => e
  # Wrap a known issue where an instance method was defined in the class without
  # it being ignored with NON_RPC_METHODS. 
  raise ArgumentError, "#{e.message} (Note: This could mean that you need to add the method #{old} to the NON_RPC_METHODS list)"
end