diff --git a/utils.hpp b/utils.hpp
index 6f2fc62..dd81314 100644
--- a/utils.hpp
+++ b/utils.hpp
@@ -5,6 +5,8 @@
 #include <phosphor-logging/lg2.hpp>
 #include <sdbusplus/bus.hpp>
 
+#include <vector>
+
 namespace phosphor
 {
 namespace time
@@ -12,6 +14,13 @@
 namespace utils
 {
 
+using Path = std::string;
+using Service = std::string;
+using Interface = std::string;
+using Interfaces = std::vector<Interface>;
+using MapperResponse =
+    std::vector<std::pair<Path, std::vector<std::pair<Service, Interfaces>>>>;
+
 /** @brief The template function to get property from the requested dbus path
  *
  * @param[in] bus          - The Dbus bus object
@@ -57,6 +66,20 @@
 std::string getService(sdbusplus::bus_t& bus, const char* path,
                        const char* interface);
 
+/** @brief Get sub tree from root, depth and interfaces
+ *
+ * @param[in] bus           - The Dbus bus object
+ * @param[in] root          - The root of the tree to search
+ * @param[in] interfaces    - All interfaces in the subtree to search for
+ * @param[in] depth         - The number of path elements to descend
+ *
+ * @return The name of the service
+ *
+ * @throw sdbusplus::exception_t when it fails
+ */
+MapperResponse getSubTree(sdbusplus::bus_t& bus, const std::string& root,
+                          const Interfaces& interfaces, int32_t depth);
+
 /** @brief Convert a string to enum Mode
  *
  * Convert the time mode string to enum.