PerformanceWarning: Determining the column names of a LazyFrame requires resolving its schema, which is a potentially expensive operation.

[david-waterworth]

I installed rev 0232fe4 which appears to work, but now there's a lot of warnings due to code like

    if isinstance(X, pl.DataFrame):
        X = X.lazy()

    entity_col = X.columns[0]

To suppress I think the following is required

    if isinstance(X, pl.DataFrame):
        X = X.lazy()

    entity_col = X.collect_schema().names()[0]

/home/dave/dev/timeseries-analysis/.venv/lib/python3.10/site-packages/functime/cross_validation.py:129: PerformanceWarning: Determining the column names of a LazyFrame requires resolving its schema, which is a potentially expensive operation. Use LazyFrame.collect_schema().names() to get the column names without this warning.