public/js/main-built.js
function headersGetter(headers) {
  var headersObj = isObject(headers) ? headers : undefined;

  return function(name) {
    if (!headersObj) headersObj =  parseHeaders(headers);

    if (name) {
      return headersObj[lowercase(name)] || null;
    }

    return headersObj;
  };
}
function headersGetter(headers) {
  var headersObj = isObject(headers) ? headers : undefined;

  return function(name) {
    if (!headersObj) headersObj =  parseHeaders(headers);

    if (name) {
      return headersObj[lowercase(name)] || null;
    }

    return headersObj;
  };
}
function headersGetter ( headers ) { var headersObj = isObject ( headers ) ? headers : undefined ; return function ( name ) { if ( ! headersObj ) headersObj = parseHeaders ( headers ) ; if ( name ) { return headersObj [ lowercase ( name ) ] || null ; } return headersObj ; } ; }
Returns a function that provides access to parsed headers.

Headers are lazy parsed when first requested.
@see parseHeaders

@param {(string|Object)} headers Headers to provide access to.
@returns {function(string=)} Returns a getter function which if called with:

- if called with single an argument returns a single header value or null
- if called with no arguments returns an object containing all headers.
Returns a function that provides access to parsed headers .