The attribute name to update. Nested attributes
can be accessed using dot notation; for example a.b.c. Attribute
names with literal dots should escape them with a backslash; for
example a\.b\.c.
The index of the item in the list. A number.
The element to set.
Generated using TypeDoc
Set an element at the index of an existing list. If the index does not exist it will be added at the end.