Function glsp_engine::try_call

pub fn try_call<R, A>(is_verbose: bool, receiver: &R, args: A) -> GResult<Val> where
    R: CallableOps,
    A: IntoCallArgs, 

Calls a function with either verbose or brief error-reporting.

try and try-verbose work by invoking glsp::try_call.

When the program begins, the default error-reporting style is verbose.