Function refcounted_he_fetch_pv 

pub unsafe fn refcounted_he_fetch_pv(
    my_perl: *mut PerlInterpreter,
    a: *const refcounted_he,
    b: *const c_char,
    c: U32,
    d: U32,
) -> *mut SV

thx shim for crate::refcounted_he_fetch_pv.