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: singular_association.rb
    path of file: ./repos/associationist/lib/associationist/associations
    
    the code of the file until where you have to start completion: module Associati
    
      def klass
        if reflection.config.scope_proc
          association_scope.klass
        else
          if reflection.config.class_name
            reflection.config.class_name.constantize
          else
            Object
          end