Using app context in routes.jsx [Is it possible? Should I?] MANTRA

Using a mantra build…

In routes.jsx there a few variables being passed into the function:

export default function (injectDeps, {FlowRouter}) {
I am a bit lost on how to pass the app context into the function to use within router actions…so something like this:

export default function (injectDeps, {FlowRouter,context}) {
I tried I few things but I can not figure it out.

I know in composers the exported function composer receives the context from somewhere but I am unable to find where:

export const composer = ({context}, onData) => {
Other than being against methodology is there any reason not to do this?

Has anyone done this? If so, how?