pub fn headers(mut self, headers: crate::header::HeaderMap) -> RequestBuilder {
        if let Ok(ref mut req) = self.request {
            replace_headers(req.headers_mut(), headers);
        }
        self
    }
/// Add a set of Headers to the existing ones on this Request.
///
/// The headers will be merged in to any already set.
Add a set of Headers to the existing ones on this Request.
The headers will be merged in to any already set.
Add a set of Headers to the existing ones on this Request . The headers will be merged in to any already set .
pub fn headers(mut self, headers: crate::header::HeaderMap) -> RequestBuilder {
        if let Ok(ref mut req) = self.request {
            replace_headers(req.headers_mut(), headers);
        }
        self
    }
pub fn headers ( mut self , headers : crate :: header :: HeaderMap ) -> RequestBuilder { if let Ok ( ref mut req ) = self . request { replace_headers ( req . headers_mut ( ) , headers ) ; } self }
Add a set of Headers to the existing ones on this Request.
Add a set of Headers to the existing ones on this Request .
mut self
headers
crate::header::HeaderMap
mut self
headers
crate::header::HeaderMap