Function SCIPincludeNlpSolverAll 

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

create solver interface for the solver “All” and includes it into SCIP, if at least 2 NLPIs have already been included

This method should be called after all other NLP solver interfaces have been included.

@ingroup NLPIIncludes