You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: grpc_error_processor.rb
    path of file: ./repos/gitlabhq/lib/gitlab/error_tracking/processor
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Gitlab
  module ErrorTracking
    module Processor
   
    
          def process_custom_fingerprint(event)
            fingerprint = event.fingerprint

            return event unless custom_grpc_fingerprint?(fingerprint)

            message, _ = split_debug_error_string(fingerprint[1])
            fingerprint[1] = message if message
          end