Cannot create #fun of typedef functions

I have the following typedef: `typedef const char* fmi2GetTypesPlatformTYPE(void);`
And the following function: `__declspec(dllexport) fmi2GetTypesPlatformTYPE fmi2GetTypesPlatform;`

I have tried `{#fun unsafe fmi2GetTypesPlatform as ^ {} -> `String' #}` but this gives me
fmi2Functions.chs:5: (column 14) [ERROR] >>> Function expected!
A function is needed here, but this declarator does not declare
a function.

I have also tried mapping the typedef first with
`type Fmi2GetTypesPlatformTYPE = {#type fmi2GetTypesPlatformTYPE#}`
but with the same result.

Is typedef functions not supported by C2HS? If so, then this is a feature request

Another option is to define/use types inside a #type and marshallers. E.g. mapping the function
`typedef fmi2Status fmi2SetupExperimentTYPE (fmi2Component, fmi2Boolean, fmi2Real, fmi2Real, fmi2Boolean, fmi2Real);` with
`type Fmi2SetupExperimentTYPE = {#type fmi2SetupExperimentTYPE#}`
gives the result:
`type Fmi2SetupExperimentTYPE = (((fmi2Component) -> (CInt -> (CDouble -> (CDouble -> (CInt -> (CDouble -> (IO CInt))))))))`

I have defined fmi2Boolean as `type Fmi2Boolean = {#type fmi2Boolean#}` and therefore it would be nice if this type was used instaed of CInt