/// <summary>
 /// Returns <c>true</c> if the specified column:
 ///  * is a vector of length N
 ///  * has a SlotNames metadata
 ///  * metadata type is VBuffer&lt;ReadOnlyMemory&lt;char&gt;&gt; of length N
 /// </summary>
 public static bool HasSlotNames(this Schema.Column column)
 => column.Type.IsKnownSizeVector && column.HasSlotNames(column.Type.VectorSize);