From the assembly editor, you can open and edit a component's implementation.
The component's implementation executes the mediation flow logic of the service.
Prerequisite:The implementation of the component has to exist
before you can open it. If the component has an exclamation mark in the lower
left corner, then its implementation has not been created. For example, the
following image shows a component that has a mediation flow implementation
type but
the implementation has
not been created:

The following image shows a mediation flow component and its implementation
has been created:

To open a component's implementation while you are working with the
assembly editor, double-click the component on the canvas or right-click
to select Open. The implementation is opened for editing.
If there is no implementation for the component, you will get a message asking
if you want to create a new one.