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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 _updateTargetFromNode(self):
 """ Applies the configuration to the grid of the plot item. """

        self.plotItem.showGrid(x=self.xGridCti.configValue, y=self.yGridCti.configValue,
                               alpha=self.alphaCti.configValue)
        self.plotItem.updateGrid()