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: core_ext.rb
    path of file: ./repos/wongi-engine/lib/wongi-engine
    
    the code of the file until where you have to start completion: module Wongi::Engine
  module CoreExt
    module ClassMethods
      def attr_predicate(*na
    
      def attr_predicate(*names)
        names_hash = names.inject({}) do |hash, element|
          if element.is_a?(Hash)
            hash.merge element
          else
            hash[element] = false
            hash
          end
        end