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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 apply_multicolor_transit(self,band,depth):
 """ Applies constraint corresponding to measuring transit in different band This is not implemented yet. """

        if '{} band transit'.format(band) not in self.constraints:
            self.constraints.append('{} band transit'.format(band))
        for pop in self.poplist:
            pop.apply_multicolor_transit(band,depth)