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: smart_properties_spec.rb
    path of file: ./repos/tapioca/spec/tapioca/dsl/compilers
    
    the code of the file until where you have to start completion: # typed: strict
# frozen_string_literal: true

require "spec_helper"

module Tapioca
  module Dsl
    module Compilers
      class SmartPropertiesSpec < ::DslSpec
        describe "Tapioca::Dsl::Compilers::SmartProperties" do
          sig { void }
          def before_setup
            require "smart_properties"
          end

          describe "initialize" do
            it "gathers no constants if there are no SmartProperty classes" do
             
    
                    def body; end

                    sig { params(body: T.nilable(::String)).returns(T.nilable(::String)) }
                    def body=(body); end

                    sig { returns(T.nilable(::String)) }
                    def title; end

                    sig { params(title: T.nilable(::String)).returns(T.nilable(::String)) }
                    def title=(title); end
                  end
                end
              RBI

              assert_equal(expected, rbi_for(:Post))
            end

            it "generates RBI file for smart property that accepts another ObjectClass" do
              add_ruby_file("post.rb", <<~RUBY)
                class Post
                  include SmartProperties

                  class TrackingInfoInput
                    include SmartProperties

                    property! :number, accepts: String
                    property :carrier_id, accepts: String
                    property :url, accepts: String
                  end

                  property :title, accepts: TrackingInfoInput
                end