nl_tokens: Returns a data accessor given an eventKey prop
pl_tokens: function getEventKey ( <mask> ) { // creates a data accessor function // given a property key, path, array index, or null for identity. if ( isFunction ( key ) ) { return key ; } else if ( key === null || key === undefined ) { return ( ) => undefined ; } // otherwise, assume it is an array index, property key or path (_.property handles all three) return property ( key ) ; }