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: executions_controller.rb
    path of file: ./repos/system_tester/app/controllers/system_tester
    
    the code of the file until where you have to start completion: module SystemTester
  class ExecutionsController < ApplicationController
    def create
      feature = params[:feature_id].present? ? Fe
    
    def handle_command
      command_handler = CommandHandler.new(@cmd)
      position = 0
      command_handler.run_each_line do |char|
        ActionCable.server.broadcast "system_tester_execution", {output: char, position: position}
        position += 1
      end
    end