How to use the pandasgui.widgets.dialogs.Dragger function in pandasgui

y = dict["Y Variable"][0]
            c = dict["Color By"][0]
        except IndexError:
            c = None

        sns.scatterplot(x, y, c, data=df)
        plt.show()


if __name__ == "__main__":
    import sys
    from PyQt5.QtWidgets import QApplication

    app = QApplication(sys.argv)

    test = Dragger(sources=["a", "b"], destinations=["x", "y", "z"])
    test.show()
    sys.exit(app.exec_())

def makePicker(self):
        self.layout.removeWidget(self.picker)
        self.df[self.column_name].astype(str).unique()
        self.picker = Dragger(
            self.names.text().split(","), self.df[self.column_name].astype(str).unique()
        )
        print(self.df[self.column_name].astype(str).unique())
        self.layout.addWidget(self.picker)

def __init__(self, df, column):
        super().__init__()

        self.layout = QtWidgets.QVBoxLayout()
        self.setLayout(self.layout)
        self.df = df
        from pandasgui import show

        self.column_name = column
        self.names = QtWidgets.QLineEdit()
        self.names.textChanged.connect(self.makePicker)

        self.picker = Dragger(["col1", "col2", "col3"], df[column].astype(str).unique())

        # Add button
        btnFinish = QtWidgets.QPushButton("Finish")
        btnFinish.clicked.connect(self.finish)
        btnReset = QtWidgets.QPushButton("Reset")
        btnReset.clicked.connect(self.finish)
        buttonLayout = QtWidgets.QHBoxLayout()
        spacer = QtWidgets.QSpacerItem(
            0, 0, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum
        )
        buttonLayout.addSpacerItem(spacer)
        buttonLayout.addWidget(btnReset)
        buttonLayout.addWidget(btnFinish)

        # Add all to layout
        self.layout.addLayout(buttonLayout)

def __init__(
        self, dataframes, destination_names, title, parent=None, default_df=None
    ):

        super().__init__(parent)

        self.dataframes = dataframes
        self.setWindowTitle(title)

        layout = QtWidgets.QVBoxLayout()
        self.setLayout(layout)

        # Create column picker
        self.columnPicker = Dragger(destination_names=destination_names)

        # Create DataFrame picker dropdown
        self.dataframePicker = QtWidgets.QComboBox()
        # Fill the dataframe picker with the names of dataframes
        for df_name in dataframes.keys():
            self.dataframePicker.addItem(df_name)

        # Set default selection and trigger currentIndexChanged
        index = self.dataframePicker.findText(default_df)
        if index != -1:
            self.dataframePicker.setCurrentIndex(index)
        else:
            self.dataframePicker.setCurrentIndex(0)
        self.dataframeChanged()

        # Connect signals