Renaming method to get clear name

Because firstElement is more clear than get(elements, 0).

vraptor-core/src/main/java/br/com/caelum/vraptor/interceptor/Graph.java

@@ -16,7 +16,6 @@
 package br.com.caelum.vraptor.interceptor;
 
 import static com.google.common.base.Preconditions.checkState;
-import static com.google.common.collect.Iterables.get;
 import static com.google.common.collect.Sets.difference;
 import static com.google.common.collect.Sets.newHashSet;
 
@@ -113,15 +112,19 @@ private String cycle() {
 	}
 
 	private List<E> findCycle() {
-		E node = get(graph.keySet(), 0);
+		E node = firstElement(graph.keySet());
 		List<E> cycle = new ArrayList<>();
 		do {
 			cycle.add(node);
-		} while(!cycle.contains(node = get(graph.get(node), 0)));
+		} while(!cycle.contains(node = firstElement(graph.get(node))));
 
 		return cycle.subList(cycle.indexOf(node), cycle.size());
 	}
 
+	private E firstElement(Iterable<E> elements) {
+		return elements.iterator().next();
+	}
+
 	private void removeLeaves() {
 		Set<E> leaves = findLeaves();
 		if (leaves.isEmpty()) {
@@ -139,4 +142,4 @@ private void removeLeaves() {
 	private Set<E> findLeaves() {
 		return difference(newHashSet(graph.values()), graph.keySet());
 	}
-}
+}