| FhirRefSequenceDAO | 
 Enables the next value to be retrieved from the ref sequence. 
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| IBatchParameterProcessor | 
 Processes batched parameters 
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| IMessageHandler | 
 Our interface for handling messages received by the consumer. 
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| IParameterIdentityCache | 
 Interface to hides the implementation of various caches we use during
 ingestion persistence. 
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| IParamValueCollector | 
 Collects instances of search parameter values associated with a particular resource (identified by the logicalResourceId). 
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| IParamValueProcessor | 
 Interface for a processor which can handle the different parameter types defined at the schema level. 
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| ParameterNameDAO | 
 This Data Access Object interface defines APIs specific to parameter_names table. 
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