computedSignalCount property
Number of computed signals in this subtree.
Equivalent to
depthFirstSignals().where((s) => s.isComputed).length
but avoids allocating the intermediate list.
Implementation
int get computedSignalCount =>
signals.where((s) => s.isComputed).length +
children.fold<int>(0, (sum, c) => sum + c.computedSignalCount);