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The Provider Management Service provides numerous methods that other modules can call to perform provider management functionality. It is relatively well commented. Note that the API methods almost always returns Persons, not Providers as results. The idea was to hide the inner workings of the Provider type from the API consumer. This may or may not prove to be a good decision. Also, note that while the UI does not support Persons with more than one associated Providers, the API should does support this.