`TFPDocMarkDownBlockRenderer`
pt		CheckParent
pt		CheckIsValidName
pt		GetSectionType
pt		GetElementType
pt		Append
pt		AppendNl

`TMarkDownBlockRenderer`
pt		DoRender
		BlockClass
		RegisterRenderer
		Render

`TMarkDownElementRenderer`
pt		GetParentRenderers
pt		GetFirstParentWithClass
		create
		reset