pub unsafe extern "C" fn pdf_xref_entry_map(
ctx: *mut fz_context,
doc: *mut pdf_document,
fn_: Option<unsafe extern "C" fn(arg1: *mut fz_context, arg2: *mut pdf_xref_entry, i: c_int, doc: *mut pdf_document, arg3: *mut c_void)>,
arg: *mut c_void,
)