question: public static Pair < Integer , Boolean > parseInfoFromFilename ( String name ) { try { if ( name . startsWith ( SAVED_TAB_STATE_FILE_PREFIX_INCOGNITO ) ) { int id = Integer . parseInt ( name . substring ( SAVED_TAB_STATE_FILE_PREFIX_INCOGNITO . length ( ) ) ) ; return Pair . create ( id , true ) ; } else if ( name . startsWith ( SAVED_TAB_STATE_FILE_PREFIX ) ) { int id = Integer . parseInt ( name . substring ( SAVED_TAB_STATE_FILE_PREFIX . length ( ) ) ) ; return Pair . create ( id , false ) ; } } catch ( NumberFormatException ex ) { } return null ; }
target:  Parse the tab id and whether the tab is incognito from the tab state filename.