fn parse_self_position(
input: &mut Parser<'_>,
axis: AxisDirection,
allow_anchor_center: AllowAnchorCenter,
) -> Result<AlignFlags, ParseError>fn parse_self_position(
input: &mut Parser<'_>,
axis: AxisDirection,
allow_anchor_center: AllowAnchorCenter,
) -> Result<AlignFlags, ParseError>