static Map<Pair<Variable, String>, Collection<Procedure<Object>>> externalMap = new HashMap<Pair<Variable, String>, Collection<Procedure<Object>>>();
static Map<Pair<Variable, String>, Object> externalValueMap = new HashMap<Pair<Variable, String>, Object>();
static Map<Pair<Variable, String>, Collection<Procedure<Object>>> externalMap = new HashMap<Pair<Variable, String>, Collection<Procedure<Object>>>();
static Map<Pair<Variable, String>, Object> externalValueMap = new HashMap<Pair<Variable, String>, Object>();