$batchPaths[$srcPathRel] = 1; // remove duplicates
if ( count( $batchPaths ) >= $this->mBatchSize ) {
$this->copyFileBatch( array_keys( $batchPaths ), $backendRel, $src, $dst );
$batchPaths[$srcPathRel] = 1; // remove duplicates
if ( count( $batchPaths ) >= $this->mBatchSize ) {
$this->copyFileBatch( array_keys( $batchPaths ), $backendRel, $src, $dst );