Function SCIPconshdlrGetNActiveConss 

pub unsafe extern "C" fn SCIPconshdlrGetNActiveConss(
    conshdlr: *mut SCIP_CONSHDLR,
) -> c_int

gets number of active constraints of constraint handler

@note A constraint is active if it is global and was not removed or it was added locally (in that case the local flag is TRUE) and the current node belongs to the corresponding sub tree.