question: public ImportFolderValidation validate ( final String path ) { Check . notNull ( path , "path" ) ; if ( validationCache == null ) { validationCache = new HashMap ( ) ; } else { if ( validationCache . containsKey ( path ) ) { return ( ImportFolderValidation ) validationCache . get ( path ) ; } } final ImportFolderValidation validation = computeValidation ( path ) ; validationCache . put ( path , validation ) ; return validation ; }
target:  Validate a potential path for import