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

require_relative "version"

##
# A Requirement is a set of one or 
    
  def self.create(*inputs)
    return new inputs if inputs.length > 1

    input = inputs.shift

    case input
    when Gem::Requirement then
      input
    when Gem::Version, Array then
      new input
    when "!" then
      source_set
    else
      if input.respond_to? :to_str
        new [input.to_str]
      else
        default
      end