DygraphInteraction.moveTouch = function(event, g, context) {
// If the tap moves, then it's definitely not part of a double-tap.
context.startTimeForDoubleTapMs = null;
DygraphInteraction.moveTouch = function(event, g, context) {
// If the tap moves, then it's definitely not part of a double-tap.
context.startTimeForDoubleTapMs = null;