would be good to warn user if no samples are left when filtering down to allowed_values

[sjanssen2]

ancombc2-heatmaps/ancombc2_heatmaps/data.py

Lines 94 to 97 in 172c159

	for col, allowed in cfg.allowed_values.items():
	if col not in meta.columns:
	raise ValueError(f"allowed_values references unknown column: {col}")
	meta = meta[meta[col].isin(allowed)].copy()