labelWidget label; interactive widgets also use it for ID generation. A ## suffix can distinguish IDs without displaying the suffix.
flagsImGuiTreeNodeFlags options controlling this operation; combine compatible flag bits with |.
True if the node is open and children should be submitted. Follow an open node with TreePop(), unless ImGuiTreeNodeFlags.NoTreePushOnOpen is set.
Display a configurable expandable tree node identified by its label.