public void OnOperationStartHandler(ICallable operation, IApplyData arguments)
{
// We don't want to process operations whose parent is a measurement gate (will mess up gate visualization)
var metadata = (this.operations.Count == 0) || (!this.operations.Peek()?.IsMeasurement ?? true)
? operation.GetRuntimeMetadata(arguments)
: null;
// We also push on `null` operations to the stack instead of ignoring them so that we pop off the
// correct element in `OnOperationEndHandler`.
this.operations.Push(this.MetadataToOperation(metadata));
}
