fn position(
position_encoding: &PositionEncoding,
span: &DiagnosticSpan,
line_number: usize,
column_offset_utf32: usize,
) -> Positionfn position(
position_encoding: &PositionEncoding,
span: &DiagnosticSpan,
line_number: usize,
column_offset_utf32: usize,
) -> Position