kogito-springboot-examples/process-usertasks-custom-lifecycle-springboot/src/main/java/org/acme/travels/usertasks/CustomUserTaskLifeCycle.java [97:104]:
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    public Optional<UserTaskTransitionToken> transition(UserTaskInstance userTaskInstance, UserTaskTransitionToken userTaskTransitionToken, IdentityProvider identityProvider) {
        checkPermission(userTaskInstance, identityProvider);
        UserTaskTransition transition = transitions.stream()
                .filter(t -> t.source().equals(userTaskInstance.getStatus()) && t.id().equals(userTaskTransitionToken.transitionId()))
                .findFirst()
                .orElseThrow(() -> new UserTaskTransitionException("Invalid transition from " + userTaskInstance.getStatus()));
        return transition.executor().execute(userTaskInstance, userTaskTransitionToken, identityProvider);
    }
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kogito-quarkus-examples/process-usertasks-custom-lifecycle-quarkus/src/main/java/org/acme/travels/usertasks/CustomUserTaskLifeCycle.java [98:105]:
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    public Optional<UserTaskTransitionToken> transition(UserTaskInstance userTaskInstance, UserTaskTransitionToken userTaskTransitionToken, IdentityProvider identityProvider) {
        checkPermission(userTaskInstance, identityProvider);
        UserTaskTransition transition = transitions.stream()
                .filter(t -> t.source().equals(userTaskInstance.getStatus()) && t.id().equals(userTaskTransitionToken.transitionId()))
                .findFirst()
                .orElseThrow(() -> new UserTaskTransitionException("Invalid transition from " + userTaskInstance.getStatus()));
        return transition.executor().execute(userTaskInstance, userTaskTransitionToken, identityProvider);
    }
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