如何从pyqt5分组框发出可动态更新的信号

from PyQt5.QtWidgets import QApplication, QMainWindow, QGroupBox, QVBoxLayout, QPushButton
from PyQt5.QtCore import pyqtSignal

class CustomGroupBox(QGroupBox):
    dynamicSignal = pyqtSignal(bool)
    
    def __init__(self, parent=None):
        super().__init__(parent)
        
        self.setTitle("Group Box")
        self.setCheckable(True)
        self.setChecked(False)
        
        self.dynamicSignal.connect(self.updateContent)
        
        layout = QVBoxLayout()
        self.setLayout(layout)
        
        button = QPushButton("Update Content")
        button.clicked.connect(self.emitSignal)
        layout.addWidget(button)
        
    def emitSignal(self):
        self.dynamicSignal.emit(self.isChecked())
        
    def updateContent(self, isChecked):
        if isChecked:
            print("Content updated!")
        else:
            print("Content not updated!")

class MainWindow(QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)
        
        groupBox = CustomGroupBox(self)
        self.setCentralWidget(groupBox)

if __name__ == "__main__":
    app = QApplication([])
    window = MainWindow()
    window.show()
    app.exec()