code: public void flushChildScopes(QName unitId) {
          Set<Integer> childScopes = findChildScopes(unitId);
          for(Integer scopeId : childScopes)
          {
              MutableContext mutableContext = statementContexts.get(scopeId);
              mutableContext.clearStatements();
          }
      }
docs: Flush the scope of unit and all children.
  
  @param unitId