refactor: rename _input_text_element_node to input_text_element_node

[mannaandpoem]

Changed the variable name from _input_text_element_node to input_text_element_node to make it accessible outside its original scope since it was being used externally.

[CLAassistant]

All committers have signed the CLA.

[pirate]

What do you mean by being used externally? It's underscore prefixed to discourage use by library users, not to prevent use between different files in the same codebase internally.

If we deem this ready to expose to library users then we will rename it.