Type Alias FunctionOutput 

pub type FunctionOutput = Result<Option<Variable>, Box<dyn Error + Send + Sync>>;

Aliased Type

pub enum FunctionOutput {
    Ok(Option<Variable>),
    Err(Box<dyn Error + Sync + Send>),
}

Variants

Ok(Option<Variable>)

Contains the success value

Err(Box<dyn Error + Sync + Send>)

Contains the error value