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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 get_dependencies(self):
 """Returns the set of data dependencies as producer infos corresponding to data requirements."""

    producer_infos = set()
    for product_type in self._dependencies:
      producer_infos.update(self._get_producer_infos_by_product_type(product_type))
    return producer_infos