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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 point_to_index(self, point):
 """ Convert a point to an index in the matrix array. Parameters point: (3,) float, point in space Returns --------- index: (3,) int tuple, index in self.matrix """

        indices = points_to_indices(points=[point],
                                    pitch=self.pitch,
                                    origin=self.origin)
        index = tuple(indices[0])
        return index