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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def move_layer_down(self):
 """Move the layer down."""

        layer = self.list_layers_in_map_report.selectedItems()[0]
        index = self.list_layers_in_map_report.indexFromItem(layer).row()
        item = self.list_layers_in_map_report.takeItem(index)
        self.list_layers_in_map_report.insertItem(index + 1, item)
        self.list_layers_in_map_report.item(index + 1).setSelected(True)