Method contains_key

src/client/typing/header.rs:119–121

(&self, py: Python, key: PyBackedStr)

    /// Returns true if the map contains a value for the specified key.
    #[pyo3(signature = (key))]
    fn contains_key(&self, py: Python, key: PyBackedStr) -> bool {
        py.allow_threads(|| self.0.contains_key::<&str>(key.as_ref()))
    }

    /// Returns key-value pairs in the order they were added.
    fn items(&self) -> HeaderMapItemsIter {