openid/src/main/java/org/springframework/security/openid/RegexBasedAxFetchListFactory.java
public List<OpenIDAttribute> createAttributeList(String identifier) {
		for (Map.Entry<Pattern, List<OpenIDAttribute>> entry : idToAttributes.entrySet()) {
			if (entry.getKey().matcher(identifier).matches()) {
				return entry.getValue();
			}
		}

		return Collections.emptyList();
	}
public List<OpenIDAttribute> createAttributeList(String identifier) {
		for (Map.Entry<Pattern, List<OpenIDAttribute>> entry : idToAttributes.entrySet()) {
			if (entry.getKey().matcher(identifier).matches()) {
				return entry.getValue();
			}
		}

		return Collections.emptyList();
	}
Iterates through the patterns stored in the map and returns the list of attributes
defined for the first match. If no match is found, returns an empty list.