toString method

@override String toString()

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() => "${describeIdentity(this)}("
    "_sub: $_sub, "
    "hasValue: $hasValue, "
    "${hasValue ? "value: $value, " : ""}"
    "isDone: $isDone, "
    "isCancelled: $isCancelled, "
    "hadError: $hadError)";