Why has core-drawer-panel no polymer-gestures?

[gertcuykens]

I am confused, I expected to see PolymerGestures.addEventListener(element, eventname, handler, capture) somewhere in the source code?

view-source:https://www.polymer-project.org/components/core-drawer-panel/core-drawer-panel.html

Instead I see something like this

eventDelegates: {
      trackstart: 'trackStart',
      trackx: 'trackx',
      trackend: 'trackEnd',
      down: 'downHandler',
      up: 'upHandler',
      tap: 'tapHandler'
    },

Does it mean that polymer already has gestures build in?

(http://stackoverflow.com/questions/28527375/do-i-need-to-use-eventdelegates-or-polymergestures-addeventlistener)