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: field.rb
    path of file: ./repos/blueprinter/lib/blueprinter
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

# @api private
module Blueprinter
  class Field
    attr_reader :method, :name, :extractor, :options, :blueprint

    def initialize(method, name, extractor, 
    
    def callable_from(condition)
      config = Blueprinter.configuration

      # Use field-level callable, or when not defined, try global callable
      tmp = if options.key?(condition)
              options.fetch(condition)
            elsif config.valid_callable?(condition)
              config.public_send(condition)
            end