protected void exclude(String... excludes) {
		excluded.addAll(Arrays.asList(excludes));
		possibleValues.removeAll(excluded);
	}
Whether the matched Spring resource should even be considered for inclusion in the result set.
Default implementation just returns true.
spring-xd-dirt/src/main/java/org/springframework/xd/dirt/server/options/ResourcePatternScanningOptionHandler.java