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: prepare_update_service.rb
    path of file: ./repos/gitlabhq/app/services/incident_management/issuable_escalation_statuses
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module IncidentManagement
  module Issu
    
      def execute
        return availability_error unless available?

        filter_unsupported_params
        filter_attributes
        filter_redundant_params

        return invalid_param_error if param_errors.any?

        ServiceResponse.success(payload: { escalation_status: params })
      end