Macro sc_executor::marshall

macro_rules! marshall {
    ( $args_iter:ident, ( $( $names:ident : $params:ty ),* ) -> $returns:ty => $body:tt ) => { ... };
    ( $args_iter:ident, ( $( $names:ident : $params:ty ),* ) => $body:tt ) => { ... };
}

Pass the list of parameters by converting them to respective WASM types.