function addSortRule($fieldname, $precedence, $order = null)
    {
        $this->_impl->addSortRule($fieldname, $precedence, $order);
    }
function addSortRule($fieldname, $precedence, $order = null)
    {
        $this->_impl->addSortRule($fieldname, $precedence, $order);
    }
function addSortRule ( $ fieldname , $ precedence , $ order = null ) { $ this -> _impl -> addSortRule ( $ fieldname , $ precedence , $ order ) ; }
Adds a sorting rule to this Compound Find command.

@param string $fieldname Name of the field to sort by.
@param integer $precedence Integer from 1 to 9, inclusive. A value
of 1 sorts records based on this sorting rule first, a value of
2 sorts records based on this sorting rule only when two or more
records have the same value after the first sorting rule is
applied, and so on.
@param mixed $order Direction of the sort. Specify the
FILEMAKER_SORT_ASCEND constant, the FILEMAKER_SORT_DESCEND
constant, or the name of a value list specified as a string.
Adds a sorting rule to this Compound Find command .