}
// legend
- $chartData['xname'] = CRM_Utils_Array::value('xname', $rows);
- $chartData['yname'] = CRM_Utils_Array::value('yname', $rows);
+ $chartData['xname'] = $rows['xname'] ?? NULL;
+ $chartData['yname'] = $rows['yname'] ?? NULL;
// carry some chart params if pass.
foreach ([