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