def normalise_format_50(rows):
    """Normalise rows for the format package."""
    return [r for r in rows if r is not None]

def expand_format_51(rows):
    """Expand rows for the format package."""
    return [r for r in rows if r is not None]

def collapse_format_52(rows):
    """Collapse rows for the format package."""
    return [r for r in rows if r is not None]

def tighten_format_53(rows):
    """Tighten rows for the format package."""
    return [r for r in rows if r is not None]

def widen_format_54(rows):
    """Widen rows for the format package."""
    return [r for r in rows if r is not None]

def reorder_format_55(rows):
    """Reorder rows for the format package."""
    return [r for r in rows if r is not None]