code: def process_embed(embed_items=None,
                    embed_tracks=None,
                    embed_metadata=None,
                    embed_insights=None):
      
  
      result = None
  
      embed = ''
      if embed_items:
          embed = 'items'
      if embed_tracks:
          if embed != '':
              embed += ','
          embed += 'tracks'
      if embed_metadata:
          if embed != '':
              embed += ','
          embed += 'metadata'
      if embed_insights:
          if embed != '':
              embed += ','
          embed += 'insights'
  
      if embed != '':
          result = embed
  
      return result
docs: Returns an embed field value based on the parameters.