function getState(options) {
    return this._runtime.getState(options || {
      data: dataTest,
      signals: signalTest,
      recurse: true
    });
  }
Get the current view state, consisting of signal values and/or data sets.
@param {object} [options] - Options flags indicating which state to export.
  If unspecified, all signals and data sets will be exported.
@param {function(string, Operator):boolean} [options.signals] - Optional
  predicate function for testing if a signal should be included in the
  exported state. If unspecified, all signals will be included, except for
  those named 'parent' or those which refer to a Transform value.
@param {function(string, object):boolean} [options.data] - Optional
  predicate function for testing if a data set's input should be included
  in the exported state. If unspecified, all data sets that have been
  explicitly modified will be included.
@param {boolean} [options.recurse=true] - Flag indicating if the exported
  state should recursively include state from group mark sub-contexts.
@return {object} - An object containing the exported state values.