Function first_non_trivia_token 

pub fn first_non_trivia_token(
    offset: TextSize,
    code: &str,
) -> Option<SimpleToken>

Searches for the first non-trivia character after offset.

The search skips over any whitespace and comments.

Returns Some if the source code after offset contains any non-trivia character./// Returns None if the text after offset is empty or only contains trivia (whitespace or comments).