code: function _deleteMany(model, payload, Log) {
    let request = { payload: payload }
    return _deleteManyHandler(model, request, Log)
  }
docs: DeleteMany function exposed as a mongoose wrapper.
  @param model: A mongoose model.
  @param payload: Either an array of ids or an array of objects containing an id and a "hardDelete" flag.
  @param Log: A logging object.
  @returns {object} A promise returning true if the delete succeeds.
  @private