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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 _initialize_operation_name_to_id(self):
 """Initializer for _operation_name_to_id. Returns: a {string: int}, mapping operation names to their index in _operations. """

    operation_name_to_id = {}
    for i, operation in enumerate(self._operations):
      operation_name_to_id[operation.name] = i
    return operation_name_to_id