getFieldValue

   let myText = "Hello World!";
   brixxApi.setFieldValue("myControlId", myText);
   value = brixxApi.getFieldValue('fieldId');

   let myFieldId = 'fieldId';
   let value = brixxApi.getFieldValue(myFieldId);

   let itemId = brixxApi.getFieldValue('itemCombobox'); //like any other control
   let taxKeyId = brixxApi.getFieldValue('itemCombobox.itmTaxKeyId'); //get the itmTaxKeyId value of the selected entry in acomboBox
   let itemName = brixxApi.getFieldValue('itemCombobox.itmName');

   let taxKeyId = brixxApi.getFieldValue('itemList').itmTaxKeyId; //get the itmTaxKeyId value of the selected entry in a grid
   let allRowsFromMyGrid = brixxApi.getFieldValue('itemList.allRows'); //get an array of all rows in a grid

   let selectedRowsFromMyGrid = brixxApi.getFieldValue('itemList.selectedRows'); //get an array of all selected rows in a grid
   let unselectedRowsFromMyGrid = brixxApi.getFieldValue('itemList.unselectedRows'); //get an array of all unselected rows in a grid
   let myRowJsonObject = brixxApi.getFieldValue('itemList.clickedRow'); //get the clicked row as a json object (only valid in onRowClick and onCellClick events)
   let myCellValue = brixxApi.getFieldValue('itemList.clickedCell'); //get the clicked cells formatted value (only valid in onCellClick events)
   let myCellId = brixxApi.getFieldValue('itemList.clickedCellId'); //get the clicked cells id (only valid in onCellClick events)

   for(let i = 0; i < allRowsFromMyGrid.length; i++){
   console.log(allRowsFromMyGrid[i].itmTaxKeyId);
   }