This class is missing documentation.
.hi = hi
.init(parent, bounds)
.keyDown(char, modifiers, unicode, keycode)
.lo = lo
.mouseDown(x, y, modifiers, buttonNumber, clickCount)
.mouseUp(x, y, modifiers, buttonNumber)
Copy and paste the text below and save to HelpSource/Classes/SmoothRangeSlider.schelp
link::Classes/SmoothRangeSlider::