Method insert

src/header.rs:133–140

Add the given (key, value) pair to the header

(&mut self, key: impl Into<String>, value: T)

    /// Add the given (key, value) pair to the header
    pub fn insert<T>(&mut self, key: impl Into<String>, value: T)
    where
        T: Serialize,
    {
        let value =
            serde_json::to_value(value).expect("serializing extra header value must not fail");
        self.inner.insert(key.into(), value);
    }

    /// Get the raw extra values specified in the header
    pub fn inner(&self) -> &BTreeMap<String, serde_json::Value> {