Function pair_pos_intersects 

fn pair_pos_intersects<'a, T, O>(
    coverage: &CoverageTable<'_>,
    pair_sets: ArrayOfOffsets<'a, T, O>,
    count: u32,
    glyphs: &IntSet<GlyphId>,
) -> Result<bool, ReadError>
where
    T: FontRead<'a> + Intersect,
    T::Args: Copy + 'static,
    O: Scalar + Offset,

Returns whether a pair set of a covered glyph in glyphs intersects them, for either pair set width.