Function fress::map::assoc::child_has_key

pub fn child_has_key(
    child_pop: AnchoredLine, 
    k: Unit, 
    hash: u32, 
    has_vals: u32, 
    chunk_idx: u32, 
    p: Pop, 
    c: Segment
) -> Result<AnchoredLine, AnchoredLine>