1. DomName('PannerNode.setVelocity')
  2. DocsEditable()
void setVelocity(num x, num y, num z)

Source 

@DomName('PannerNode.setVelocity')
@DocsEditable()
void setVelocity(num x, num y, num z) => _blink.BlinkPannerNode.instance.setVelocity_Callback_3_(this, x, y, z);