Role Link

1. Initiating Role (first send or receive)
Used to specify how the role link is initialized.
If the implements role is specified, then the role link will be initialized automatically upon receipt of a message. If the uses role is specified, then the role link needs to be initialized using an expression shape.

2. Implements Role: Receive
Indicates the name of the role this orchestration will play in the Role Link. This role receives messages

3. Uses Role: Send
Indicates the name of the role this orchestration will send messages to.