| Class and Description | 
|---|
| Service Service call with I input type and R return type. | 
| ServiceRegistry A basic service registry implementation used by  CallStep. | 
| Class and Description | 
|---|
| ServiceRegistry A basic service registry implementation used by  CallStep. | 
| Class and Description | 
|---|
| Service Service call with I input type and R return type. | 
| Service.DirectoryService Meta-service to list and describe registered callable services. | 
| Service.ServiceCallContext Context information for service call invocation. | 
| Service.ServiceFactory The service factory creates instances of callable services based on the desired execution type. | 
| Service.Type Service calls can appear at the start of a traversal or mid-traversal. | 
| ServiceRegistry A basic service registry implementation used by  CallStep. | 
| Class and Description | 
|---|
| Service Service call with I input type and R return type. | 
| Service.DirectoryService Meta-service to list and describe registered callable services. | 
| Service.ServiceCallContext Context information for service call invocation. | 
| Service.ServiceFactory The service factory creates instances of callable services based on the desired execution type. | 
| Service.Type Service calls can appear at the start of a traversal or mid-traversal. | 
| ServiceRegistry A basic service registry implementation used by  CallStep. | 
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