def __init__(self, parent=None):
    super().__init__(parent)
    self.mRootItem = QJsonTreeItem()
    self.mHeaders = ['key', 'value', 'type']
def __init__(self, parent=None):
    super().__init__(parent)
    self.mRootItem = QJsonTreeItem()
    self.mHeaders = ['key', 'value', 'type']