The 'Set Connection Runtime Order' at the output port for every transformer has been introduced in FME 2016.1. It's very useful to control the feature flow, but it might be further better if the user could also control the connection order at the input port optionally.
In-Flow Control: Optionally the user can specify the order of the input connections flowing into a transformer. Also it should have the "Group By" parameter.
This would allow the user to control the input order for some transformers which combine features coming from multiple connections, such as RasterMosaicker, RasterBandCombiner etc., without using the Sorter.
The expected function may not be useful to most transformers, so it's also good to add the function to the Junction.
