pub(super) fn add_or_get_font(
font: &FontRef,
ifc_fonts: &mut Vec<FontKeyAndMetrics>,
font_context: &FontContext,
rendering_group_id: RenderingGroupId,
) -> usize
pub(super) fn add_or_get_font(
font: &FontRef,
ifc_fonts: &mut Vec<FontKeyAndMetrics>,
font_context: &FontContext,
rendering_group_id: RenderingGroupId,
) -> usize