question: public boolean writeHeader ( OutputStream os ) { try { writeInt ( os , CACHE_MAGIC ) ; writeString ( os , key ) ; writeString ( os , etag == null ? "" : etag ) ; writeLong ( os , serverDate ) ; writeLong ( os , lastModified ) ; writeLong ( os , ttl ) ; writeLong ( os , softTtl ) ; writeStringStringMap ( responseHeaders , os ) ; os . flush ( ) ; return true ; } catch ( IOException e ) { VinciLog . d ( "%s" , e . toString ( ) ) ; return false ; } }
target:  Writes the contents of this CacheHeader to the specified OutputStream.