code: def mouseReleaseEvent(self, ev):
      self.setChecked(False)
      self.setState(0, 0)
  
file_path: pyqtgraph/pyqtgraph/widgets/JoystickButton.py
imports: from math import hypot
  from ..Qt import QtCore, QtGui, QtWidgets
label_desc: Use image node_id 4 for calling the JoystickButton obj's underlying member method code with example usage: obj.mouseReleaseEvent(ev) without return types