pub fn append(
  headers: Headers,
  name: String,
  value: String,
) -> Nil

pub fn delete(headers: Headers, name: String) -> Nil

pub fn for_each(
  headers: Headers,
  callback: fn(String, String) -> Nil,
) -> Nil

pub fn from_array(h: array.Array(#(String, String))) -> Headers

pub fn from_headers(h: Headers) -> Headers

pub fn from_string(h: String) -> Headers

pub fn get(headers: Headers, name: String) -> String

pub fn get_all(
  headers: Headers,
  name: String,
) -> array.Array(String)

pub fn has(headers: Headers, name: String) -> Bool

pub fn set(headers: Headers, name: String, value: String) -> Nil