code: function _handleDataSizeToggle() {
      let {isDataInputExpanded} = state;
      let width = isDataInputExpanded ? dataEditorWidth : '1000px';
  
      state.isDataInputExpanded = !isDataInputExpanded;
      d3.select(`#${dataInputId}`).style('width', width);
  }
docs: Exapnds the data text editor area, making it wider
  TODO: use more constants for this