nl_tokens: Creates a unique async expiration time .
pl_tokens: function computeUniqueAsyncExpiration ( ) { var currentTime = requestCurrentTime ( ) ; var result = computeAsyncExpiration ( currentTime ) ; if ( result <= lastUniqueAsyncExpiration ) { // Since we assume the current time monotonically increases, we only hit // this branch when computeUniqueAsyncExpiration is fired multiple times // within a 200ms window (or whatever the async bucket size is). <mask> = lastUniqueAsyncExpiration + 1 ; } lastUniqueAsyncExpiration = result ; return lastUniqueAsyncExpiration ; }