`TCustomHTTPDataContentProducer`
pt	ro	Dataset
pt		BeforeUpdate
pt		BeforeInsert
pt		BeforeDelete
		Adaptor
		Provider
	ro	DataContentType
pl		PageStart
pl		PageSize
pl		MetaData
pl		SortField
pl		SortDescending
pl		AllowPageSize

`THTTPContentProducer`
pt		BeforeRequest
pt		AfterResponse
	ro	Request
	ro	Response