A component that specifies the initial substate for a state.
When a state is entered, the machine will recursively drill down through InitialState
components to find the leaf state(s) to activate.
A marker component for a state that has parallel (orthogonal) regions.
When a state with this component is entered, the machine will simultaneously enter
the initial state of each of its direct children.
An event that triggers a state transition in a machine.
Prefer using edge to reference a transition entity. The legacy connection
field is retained for initialization and backward compatibility.