Add some temporary debug logging

headless-services/commons/commons-language-server/src/main/java/org/springframework/ide/vscode/commons/languageserver/util/SimpleTextDocumentService.java

@@ -367,6 +367,7 @@ public class SimpleTextDocumentService implements TextDocumentService, DocumentE
 					// vscode client does not like to recieve null result. See: https://github.com/spring-projects/sts4/issues/309
 					locations = ImmutableList.of();
 				}
+				log.info("definition locations: {}", locations);
 				return Either.forLeft(locations);
 			});
 		}