code: function ByKeyBase(options, pbRequestName, pbResponseName, callback) {
      CommandBase.call(this, pbRequestName, pbResponseName, callback);
      this.validateOptions(options, schema);
  }
docs: Base class for Get and Delete classes.
  @module TS
   
  @class ByKeyBase
  @constructor
  @param {Object} options The options for this command.
  @param {String} options.table The timeseries table from which retrieve a key from Riak.
  @param {Object[]} options.key The timeseries composite key to retrieve from Riak.
  @param {Function} callback The allback to be executed when the operation completes.
  @param {String} callback.err An error message. Will be null if no error.
  @param {Object} callback.response Object containing timeseries data.
  @param {Object} callback.response.columns Timeseries column data
  @param {Object} callback.response.rows Timeseries row data
  @param {Object} callback.data additional error data. Will be null if no error.
  @extends CommandBase