Returns the docs, stripped of their leading comments syntax.
Source
@override
String get documentation {
// Verify that hasSetter and hasGetterNoSetter are mutually exclusive,
// to prevent displaying more or less than one summary.
Set<bool> assertCheck = new Set()..addAll([hasSetter, hasGetterNoSetter]);
assert(assertCheck.containsAll([true, false]));
return super.documentation;
}