In UML modeling, you can nest nodes within nodes to represent
the hardware and software components in a system that contains other
components.
A diagram must be open in the diagram editor and
it must contain at least two nodes. The Nested Nodes compartment
of the container node must be visible.
To nest a node in another node, in the diagram editor,
click one node and drag it over the Nested Node compartment of another
node.
As the following figure illustrates, a node is displayed
in the Nested Nodes compartment of the container node.
