private IEnumerable <ImportColumn> GetKeyColumns(ImportParameters parameters) => parameters.GetKeyColumns();
protected IEnumerable <ImportColumn> GetKeyColumns(ImportParameters parameters) => parameters.GetKeyColumns();
private IEnumerable <ImportColumn> GetKeyColumns(ImportParameters parameters) => parameters.GetKeyColumns();
protected IEnumerable <ImportColumn> GetKeyColumns(ImportParameters parameters) => parameters.GetKeyColumns();