nl_tokens: we only require this for validation sake
pl_tokens: function ( $scope , element , attrs ) { var src = attrs . ngMessagesInclude || attrs . src ; $templateRequest ( src ) . then ( function ( html ) { if ( $scope . $$destroyed ) return ; if ( isString ( html ) && ! html . trim ( ) ) { // Empty template - nothing to compile replaceElementWithMarker ( element , src ) ; } else { // Non-empty template - compile and link $compile ( html ) ( $scope , function ( contents ) { <mask> . after ( contents ) ; replaceElementWithMarker ( element , src ) ; } ) ; } } ) ; }