Function SCIPgetNodeLowerbound 

pub unsafe extern "C" fn SCIPgetNodeLowerbound(
    scip: *mut SCIP,
    node: *mut SCIP_NODE,
) -> f64

gets lower bound of given node in transformed problem

@return lower bound of given node in transformed problem

@pre this method can be called in one of the following stages of the SCIP solving process: - \ref SCIP_STAGE_SOLVING