Understanding the create_empty Class Method: Confusion on Its Implementation

[Blurr28]

Pardon me if this is not the right place to ask such questions (not very familiar with github), but I can not understand a member function of class futuresAdjustedPrices(pd.Series) from sysobjects.adjusted_prices.py

`

@classmethod
def create_empty(futuresContractPrices):
    """
    Our graceful fail is to return an empty, but valid, dataframe
    """

    futures_contract_prices = futuresContractPrices(pd.Series(dtype="float64"))

    return futures_contract_prices`

specifically , what is futuresContractPrices supposed to be, chatGPT tells me it should be called cls because it is a class method, I don't see any other mention of this anywhere else in the codebase