toString method
A string representation of this object.
Some classes have a default textual representation,
often paired with a static parse function (like int.parse).
These classes will provide the textual representation as
their string representation.
Other classes have no meaningful textual representation
that a program will care about.
Such classes will typically override toString to provide
useful information when inspecting the object,
mainly for debugging or logging.
Implementation
@override
String toString() =>
'SIPChallengeRequest[a1=$a1, algorithm=$algorithm, charset=$charset, cnonce=$cnonce, domain=$domain, method=$method, nc=$nc, nonce=$nonce, opaque=$opaque, qop=$qop, realm=$realm, response=$response, stale=$stale, uri=$uri, userhash=$userhash, username=$username]';