#[main]Expand description
Define a fuchsia DSO main function.
This attribute should be applied to the process main function.
It will take care of setting up various Fuchsia crates for the component.
Arguments:
sync- boolean toggle for whether to use the synchronous DSO entry point.async- boolean toggle for whether to use the asynchronous DSO entry point.
The main function can return either () or a Result<(), E> where E is an error type.