Return a tuple (row, col, buffer, buffername) representing the position of the uppercase/file named mark. See |mark-motions|. Marks are (1,0)-indexed. |api-indexing| Note: fails with error if a lowercase or buffer local named mark is used. Parameters: ~ {name} Mark name {opts} Optional parameters. Reserved for future use. Return: ~ 4-tuple (row, col, buffer, buffername), (0, 0, 0, '') if the mark is not set. See also: ~ |nvim_buf_set_mark()| |nvim_del_mark()|