def _dropSynapseIndices(df):
    """
    Removes synapse schema class 'ROW_VERSION' and 'ROW_ID' columns.

    :param df:  An entity-view data frame with the possible 'ROW_VERSION' and 'ROW_ID' columns
    :return:    An entity-view data frame without the 'ROW_VERSION' and 'ROW_ID' columns
    """
    if {'ROW_VERSION', 'ROW_ID'}.issubset(df.columns):
        df.drop(['ROW_VERSION', 'ROW_ID'], axis=1, inplace=True)
    return df