Overloaded object call handler, called each time an undefined/aggregated method is invoked. This method repeats the call in the right aggregate object and passes on the return value.
Parameter
string $method
which method that was called
string $args
An array of the parameters passed in the original call
mixed &$retval
Return value
mixed - The return value from the aggregated method, or a PEAR_Error if the called method was unknown.
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