820 	 * @param Content $oldContent The page's previous content.
826 	public function merge3( Content $oldContent, Content $myContent, Content $yourContent ) {  argument
846 	 * @param Content|null $oldContent The previous text of the page.
853 		Content $oldContent = null,  argument
857 		$oldTarget = $oldContent !== null ? $oldContent->getRedirectTarget() : null;
863 		if ( $oldContent && $oldContent->getSize() > 0 &&
896 		if ( $oldContent && $newContent && $oldContent->getSize() > 10 * $newContent->getSize() ) {
901 		if ( $oldContent && $newContent && $oldContent->getModel() !== $newContent->getModel() ) {
914 	 * @param Content|null $oldContent The previous text of the page.
921 		Content $oldContent = null,  argument
925 		$changeType = $this->getChangeType( $oldContent, $newContent, $flags );
945 				$oldTarget = $oldContent->getRedirectTarget();
961 				$oldTarget = $oldContent->getRedirectTarget();
998 	 * @param Content|null $oldContent The previous text of the page.
1005 		Content $oldContent = null,  argument
1009 		$changeType = $this->getChangeType( $oldContent, $newContent, $flags );