Function hts_itr_regions 

pub unsafe extern "C" fn hts_itr_regions(
    idx: *const hts_idx_t,
    reglist: *mut hts_reglist_t,
    count: i32,
    getid: Option<unsafe extern "C" fn(*mut c_void, *const i8) -> i32>,
    hdr: *mut c_void,
    itr_specific: Option<unsafe extern "C" fn(*const hts_idx_t, *mut hts_itr_t) -> i32>,
    readrec: Option<unsafe extern "C" fn(*mut BGZF, *mut c_void, *mut c_void, *mut i32, *mut i64, *mut i64) -> i32>,
    seek: Option<unsafe extern "C" fn(*mut c_void, i64, i32) -> i32>,
    tell: Option<unsafe extern "C" fn(*mut c_void) -> i64>,
) -> *mut hts_itr_t