Function SCIPgetNLPVars 

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

gets array with variables of the NLP

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