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_assert_columns_exist

Internal helper
This page documents an internal implementation helper, not a primary public API.
Source code in src/fabricops_kit/technical_columns.py
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def _assert_columns_exist(df: Any, columns: list[str]) -> None:
    missing = [c for c in columns if c not in df.columns]
    if missing:
        raise ValueError(f"Missing required columns: {missing}")