get_span

Peeks a current span content.

The index should be between 0 and one less than get_n_spans .

Unlike the list, the returned array is owned by the this and is valid until the next content change (addition, removal, clear) of the this is done.

If thread safety is required, use dup_span instead.

Parameters:

this	an ComponentBag
index	span index, counting from 0

Returns:

an array of ComponentBag in the index span, or null when the index is out of bounds