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: import.rb
    path of file: ./repos/jruby/lib/ruby/stdlib/fiddle
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require 'fiddle'
require 'fiddle/struct'
require 'fiddle/cparser'

module Fiddle

  # Used internally by Fiddle::Importer
  class CompositeHandler
    # Create a new handler with 
    
    def extern(signature, *opts)
      symname, ctype, argtype = parse_signature(signature, type_alias)
      opt = parse_bind_options(opts)
      f = import_function(symname, ctype, argtype, opt[:call_type])
      name = symname.gsub(/@.+/,'')
      @func_map[name] = f
      # define_method(name){|*args,&block| f.call(*args,&block)}
      begin
        /^(.+?):(\d+)/ =~ caller.first
        file, line = $1, $2.to_i
      rescue
        file, line = __FILE__, __LINE__+3
      end