add(get_called_class()); } // TODO: public function debitFrom( $source, $amount, $appears_on_statement_as = null, $description = null, $meta = null) { return $source->debit( $amount, $appears_on_statement_as, $description, $meta, $this->href ); } public function creditTo( $destination, $amount, $description = null, $meta = null, $appears_on_statement_as = null) { return $destination->credit( $amount, $description, $meta, $appears_on_statement_as, $this->href ); } }