nl_tokens: Returns data with an eventKey prop added to each datum
pl_tokens: function addEventKeys ( props , data ) { const hasEventKeyAccessor = ! ! props . eventKey ; const eventKeyAccessor = getEventKey ( props . eventKey ) ; return <mask> . map ( ( datum ) => { if ( datum . eventKey !== undefined ) { return datum ; } else if ( hasEventKeyAccessor ) { const eventKey = eventKeyAccessor ( datum ) ; return eventKey !== undefined ? assign ( { eventKey } , datum ) : datum ; } else { return datum ; } } ) ; }