Function SCIPlpWriteMip 

pub unsafe extern "C" fn SCIPlpWriteMip(
    lp: *mut SCIP_LP,
    set: *mut SCIP_SET,
    messagehdlr: *mut SCIP_MESSAGEHDLR,
    fname: *const c_char,
    genericnames: c_uint,
    origobj: c_uint,
    objsense: SCIP_OBJSENSE,
    objscale: f64,
    objoffset: f64,
    lazyconss: c_uint,
) -> SCIP_RETCODE

writes MIP to a file