pub unsafe extern "C" fn CPXcallbackgetinfodbl(
context: CPXCALLBACKCONTEXTptr,
what: CPXCALLBACKINFO,
data_p: *mut f64,
) -> c_intpub unsafe extern "C" fn CPXcallbackgetinfodbl(
context: CPXCALLBACKCONTEXTptr,
what: CPXCALLBACKINFO,
data_p: *mut f64,
) -> c_int