Update branch.go

core/branch/branch.go

@@ -5,6 +5,7 @@ import "context"
 
 // Service is the branch service interface. It can be used to execute 
 // code paths in an isolated execution context that can be reverted.
+// A revert typically means a rollback on events and state changes.
 type Service interface {
 	// Execute executes the given function in an isolated context. If the
 	// `f` function returns an error, the execution is considered failed,