PipeConnectionDefinition positions not marked optional

[_CodeGreen]

PipeConnectionDefinition doesn't have positions (plural) marked as optional, when it depends on whether or not position (singular) is defined. Is this intentional, or should it be optional? It's trickling down to the Lua typedefs making me disable diagnostics every time.

[Bilka]

It's mandatory when position is not defined. I marked it optional and added that note for the next version.