code: public WhereCondition WHERE(WhereCondition whereCondition) {
          checkTokenOrderIsCorrect(ESqlToken.WHERE);
          mSgSQL.append("(");
          mSgSQL.append(whereCondition.toWhereConditionPart());
          mSgSQL.append(")");
          return WhereCondition.this;
      }
docs: Add WhereCondition object itself surrounded with bracket into where
  clause
  
  @param whereCondition
  @return