Construct this empty or with a predefined index set or cursor.
Optional
from: IIndexSetCursor | SingleIndexSetThe index set or cursor to create this from if this is defined.
An instance of DynamicSingleIndexSet
Get the number of elements in this set
The size of this.
Get a cursor that lets you iterate over the union of the sets of multiple indices.
The cursor for the list of types.
A single set of indices