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t=this.scroll,o=this.thresholdBoundary!==n.INSIDE&&this.locateInsideThresholdBoundary(),e=this.thresholdBoundary!==n.OUTSIDE&&!this.locateInsideThresholdBoundary();o&&(this.setThresholdBoundary(n.INSIDE),t.trigger("enterThreshold")),e&&(this.setThresholdBoundary(n.OUTSIDE),t.trigger("leaveThreshold"))}},t.prototype.locateInsideThresholdBoundary=function(){return this.scroll.y<=this.options.threshold},t.prototype.unwatch=function(){var t=this.scroll,o=t.scroller;this.watching=!1,o.hooks.off(o.hooks.eventTypes.end,this.checkPullDown),t.off(t.eventTypes.scrollStart,this.resetStateBeforeScrollStart),t.off(t.eventTypes.scroll,this.checkLocationOfThresholdBoundary),this.hasMouseWheelPlugin()&&t.off(t.eventTypes.mousewheelStart,this.resetStateBeforeScrollStart)},t.prototype.checkPullDown=function(){var 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