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() {
if (isEmpty) return '{}';
final buffer = StringBuffer('{');
bool first = true;
forEach((key, value) {
if (!first) {
buffer.write(', ');
}
buffer.write('$key: $value');
first = false;
});
buffer.write('}');
return buffer.toString();
}