Adapt to changes in Spring Integration's Graph

See gh-47010

Author: wilkinsona

module/spring-boot-integration/src/main/java/org/springframework/boot/integration/endpoint/IntegrationGraphEndpoint.java

@@ -71,9 +71,9 @@ public static class GraphDescriptor implements OperationResponseBody {
 		private final Collection<LinkNode> links;
 
 		GraphDescriptor(Graph graph) {
-			this.contentDescriptor = graph.getContentDescriptor();
-			this.nodes = graph.getNodes();
-			this.links = graph.getLinks();
+			this.contentDescriptor = graph.contentDescriptor();
+			this.nodes = graph.nodes();
+			this.links = graph.links();
 		}
 
 		public Map<String, Object> getContentDescriptor() {

module/spring-boot-integration/src/test/java/org/springframework/boot/integration/endpoint/IntegrationGraphEndpointTests.java

@@ -52,9 +52,9 @@ void readOperationShouldReturnGraph() {
 		Map<String, Object> contentDescriptor = new LinkedHashMap<>();
 		Collection<IntegrationNode> nodes = new ArrayList<>();
 		Collection<LinkNode> links = new ArrayList<>();
-		given(graph.getContentDescriptor()).willReturn(contentDescriptor);
-		given(graph.getNodes()).willReturn(nodes);
-		given(graph.getLinks()).willReturn(links);
+		given(graph.contentDescriptor()).willReturn(contentDescriptor);
+		given(graph.nodes()).willReturn(nodes);
+		given(graph.links()).willReturn(links);
 		given(this.server.getGraph()).willReturn(graph);
 		GraphDescriptor descriptor = this.endpoint.graph();
 		then(this.server).should().getGraph();