primefaces - What does converter="theme" refer to in the p:pickList example? -

the primefaces picklist examples contains declaration

<p:picklist id="pojopicklist" value="#{picklistview.themes}" var="theme" effect="bounce"             itemvalue="#{theme}" itemlabel="#{theme.displayname}" showsourcecontrols="true" showtargetcontrols="true" showcheckbox="true" responsive="true"             showsourcefilter="true" showtargetfilter="true" filtermatchmode="contains"             converter="theme"> 

what converter="theme" refer to? possible reference value of var, that's not valid converter it? extracting example separate java ee project , running on glassfish 4.1 not surprisingly causes failure ~named object theme not found (see https://github.com/krichter722/jsf-picklist-example provision git repository).

in showcase themeconverter.java file missing , in there can see real name being used , notice 'theme' typing error. use below code in sample project.

<p:picklist id="pojopicklist" value="#{picklistview.themes}" var="theme" effect="bounce"                         itemvalue="#{theme}" itemlabel="#{theme.displayname}" showsourcecontrols="true" showtargetcontrols="true" showcheckbox="true"                         showsourcefilter="true" showtargetfilter="true" filtermatchmode="contains" converter="themeconverter" responsive="true"> 

i try fix in github project also.