Type Alias BoxMultipartWrite 

pub type BoxMultipartWrite<'a, Part, R, T, E> = Pin<Box<dyn MultipartWrite<Part, Ret = R, Output = T, Error = E> + Send + 'a>>;

An owned, dynamically typed MultipartWrite for use in cases where it is not possible or desirable to statically type it.

Aliased Type

pub struct BoxMultipartWrite<'a, Part, R, T, E> { /* private fields */ }