Function SCIPisNLPConstructed 

pub unsafe extern "C" fn SCIPisNLPConstructed(
    scip: *mut SCIP,
) -> c_uint

returns whether an NLP has been constructed

@pre This method can be called if SCIP is in one of the following stages: - \ref SCIP_STAGE_INITSOLVE - \ref SCIP_STAGE_SOLVING