nl_tokens: Choose template for the given template name ; returns a promise
pl_tokens: function pickTemplate ( templateName ) { if ( templateName === THE_ONLY_TEMPLATE ) return theOnlyTemplate . promise ; if ( registry . hasOwnProperty ( templateName ) ) return registry [ templateName ] . promise ; if ( registryComplete ) throw noSuchTemplate ( templateName ) ; return ( registry [ templateName ] = <mask> Deferred ( ) ) . promise ; }