code: public void setScope(ProcScope scope) {
          this.scope = scope;
  
          // Scope false memo
          scopeFalseMemo = falseMemo.get(scope);
          if (scopeFalseMemo == null) {
              scopeFalseMemo = new IntSet();
              falseMemo.put(scope, scopeFalseMemo);
          }
      }
docs: Set list of codes in current context
  
  @param scope code scope