Function SCIPpresolCons 

pub unsafe extern "C" fn SCIPpresolCons(
    scip: *mut SCIP,
    cons: *mut SCIP_CONS,
    nrounds: c_int,
    presoltiming: SCIP_PRESOLTIMING,
    nnewfixedvars: c_int,
    nnewaggrvars: c_int,
    nnewchgvartypes: c_int,
    nnewchgbds: c_int,
    nnewholes: c_int,
    nnewdelconss: c_int,
    nnewaddconss: c_int,
    nnewupgdconss: c_int,
    nnewchgcoefs: c_int,
    nnewchgsides: c_int,
    nfixedvars: *mut c_int,
    naggrvars: *mut c_int,
    nchgvartypes: *mut c_int,
    nchgbds: *mut c_int,
    naddholes: *mut c_int,
    ndelconss: *mut c_int,
    naddconss: *mut c_int,
    nupgdconss: *mut c_int,
    nchgcoefs: *mut c_int,
    nchgsides: *mut c_int,
    result: *mut SCIP_RESULT,
) -> SCIP_RETCODE

presolves of single constraint

@return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref SCIP_Retcode “SCIP_RETCODE” for a complete list of error codes.

@pre This method can be called if @p scip is in one of the following stages: - \ref SCIP_STAGE_PRESOLVING

@note This is an advanced method and should be used with caution.