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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 validate_column_specs(events, columns):
 """ Verify that the columns of ``events`` can be used by a EarningsEstimatesLoader to serve the BoundColumns described by `columns`. """

    required = required_estimates_fields(columns)
    received = set(events.columns)
    missing = required - received
    if missing:
        raise ValueError(
            "EarningsEstimatesLoader missing required columns {missing}.\n"
            "Got Columns: {received}\n"
            "Expected Columns: {required}".format(
                missing=sorted(missing),
                received=sorted(received),
                required=sorted(required),
            )
        )