`TCustomExtDirectContentProducer`
pt		GetIDProperty
pt		DoGetContent

`TCustomJSONRPCContentProducer`
pt		GetIDProperty
pt		DoGetContent
pt		GetDispatcher

`THTTPContentProducer`
pt		DoHandleRequest
pt		DoGetContent
pt		ProduceContent
pt		SetRequest
		HandleRequest
		GetContent
		HaveContent
		ContentToStream