default URI getInstance() {
		return null;
	}
An absolute URI that identifies the specific occurrence of the problem.
It may or may not yield further information if dereferenced.

@return an absolute URI that identifies this specific problem
springdoc-openapi-tests/springdoc-openapi-javadoc-tests/src/test/java/test/org/springdoc/api/v30/app126/Problem.java