nl_tokens: A subject which executes its assertions on each element of an iterable .
pl_tokens: function EachSubject ( subject , elements , elementName , opt_noIndex ) { ProxyBase . call ( this ) ; this . elementSubjects = [ ] ; for ( var i = 0 ; i < elements . <mask> ; ++ i ) { var es = subjectFactory . newSubject ( subject . failureStrategy , elements [ i ] ) ; es . named ( elementName + ( opt_noIndex ? '' : ( ' ' + i ) ) + ' of ' + subject . describe ( ) ) ; es . failureMessage = subject . failureMessage ; this . elementSubjects . push ( es ) ; } }