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: partial.rb
    path of file: ./repos/picky/server/lib/picky/generators
    
    the code of the file until where you have to start completion: module Picky

  module Generators
    
    module Partial
      extend Helpers::Identification
      
      def self.from thing, index_name = nil, category_name 
    
      def self.from thing, index_name = nil, category_name = nil
        return Default unless thing

        if thing.respond_to? :each_partial
          thing
        else
          raise <<-ERROR
partial options #{identifier_for(index_name, category_name)}should be either
* for example a Partial::Substring.new(from: m, to: n), Partial::Postfix.new(from: n), Partial::Infix.new(min: m, max: n) etc.
or
* an object that responds to #each_partial(str_or_sym) and yields each partial
ERROR
        end