nl_tokens: Update targ with attributes from _defs . Any existing attributes on targ are untouched .
pl_tokens: function defaults ( targ , _defs ) { [ ] . slice . <mask> ( arguments , 1 ) . forEach ( function ( def ) { Object . keys ( def ) . forEach ( function ( key ) { if ( ! targ . hasOwnProperty ( key ) ) { targ [ key ] = def [ key ] ; } } ) ; } ) ; }