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() {
final res = StringBuffer();
final props = getProperties();
final subComponents = getSubComponents();
res.writeln("BEGIN:${componentName.toUpperCase()}");
res.writeAll(props, "\n");
if (props.isNotEmpty) res.write("\n");
res.writeAll(subComponents);
res.writeln("END:${componentName.toUpperCase()}");
return res.toString();
}