Evaluates statusline string. Attributes: ~ {fast} Parameters: ~ {str} Statusline string (see 'statusline'). {opts} Optional parameters. • winid: (number) |window-ID| of the window to use as context for statusline. • maxwidth: (number) Maximum width of statusline. • fillchar: (string) Character to fill blank spaces in the statusline (see 'fillchars'). • highlights: (boolean) Return highlight information. • use_tabline: (boolean) Evaluate tabline instead of statusline. When |TRUE|, {winid} is ignored. Return: ~ Dictionary containing statusline information, with these keys: • str: (string) Characters that will be displayed on the statusline. • width: (number) Display width of the statusline. • highlights: Array containing highlight information of the statusline. Only included when the "highlights" key in {opts} is |TRUE|. Each element of the array is a |Dictionary| with these keys: • start: (number) Byte index (0-based) of first character that uses the highlight. • group: (string) Name of highlight group.