class CanvasSync::JobBatches::ChainBuilder

def normalize!(job_def = self.base_job)
  if job_def.is_a?(ChainBuilder)
    job_def.normalize!
  else
    job_def[:job] = job_def[:job].to_s
    if (chain = self.class.get_chain_parameter(job_def, raise_error: false)).present?
      chain.map! { |sub_job| normalize!(sub_job) }
    end
    job_def
  end
end