Code example for Collection

Methods: isEmptyiterator

0
		return null; 
	}	 
	 
	public static <T> T resolvePrincipal(PrincipalCollection principals, Class<T> principalClass) {
		Collection<T> principalCollection = principals.byType(principalClass);
		if (principalCollection != null && !principalCollection.isEmpty()) {
			return principalCollection.iterator().next();
		} 
		return null; 
	} 
} 
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