pub unsafe extern "C" fn onig_set_retraction_callout_of_match_param(
param: *mut OnigMatchParam,
f: OnigCalloutFunc,
) -> c_int
pub unsafe extern "C" fn onig_set_retraction_callout_of_match_param(
param: *mut OnigMatchParam,
f: OnigCalloutFunc,
) -> c_int