Queues raw user-input. Unlike |nvim_feedkeys()|, this uses a low-level input buffer and the call is non-blocking (input is processed asynchronously by the eventloop). On execution error: does not fail, but updates v:errmsg. Note: |keycodes| like are translated, so "<" is special. To input a literal "<", send . Note: For mouse events use |nvim_input_mouse()|. The pseudokey form "<col,row>" is deprecated since |api-level| 6. Attributes: ~ |api-fast| Parameters: ~ {keys} to be typed Return: ~ Number of bytes actually written (can be fewer than requested if the buffer becomes full).