Function SCIPgetNodeDualbound 

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

gets dual bound of given node

@return dual bound of a given node

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