code: public Expression leftOuterJoin(final Expression table, final Expression expr) {
          if (table instanceof Query) {
              table.enclose();
          }
  
          joins.add(new Join("LEFT OUTER JOIN", table, expr));
  
          return this;
      }
docs: Sets a left outer join with the current table.
  
  @param table The table to join.
  @param expr  The expressions to join.
  @return This expression.