ptr_idPointer address used only as an ID seed, not dereferenced.
textUTF-8 text to read. JS strings are encoded for this call; a nonempty Uint8Array ending in NUL is passed directly, otherwise its bytes are copied and NUL-terminated.
True if the node is open and children should be submitted. Call TreePop() after submitting those children.
Display an expandable tree node with a pointer-based ID and unformatted label.