Added getSearchApi() (#425).

src/main/java/org/gitlab4j/api/GitLabApi.java

@@ -81,6 +81,7 @@ public class GitLabApi {
     private RepositoryApi repositoryApi;
     private RepositoryFileApi repositoryFileApi;
     private RunnersApi runnersApi;
+    private SearchApi searchApi;
     private ServicesApi servicesApi;
     private SessionApi sessionApi;
     private SnippetsApi snippetsApi;
@@ -1462,6 +1463,25 @@ public class GitLabApi {
         return (runnersApi);
     }
 
+    /**
+     * Gets the SearchApi instance owned by this GitLabApi instance. The SearchApi is used
+     * to perform search related API calls.
+     *
+     * @return the SearchApi instance owned by this GitLabApi instance
+     */
+    public SearchApi getSearchApi() {
+
+        if (searchApi == null) {
+            synchronized (this) {
+                if (searchApi == null) {
+                    searchApi = new SearchApi(this);
+                }
+            }
+        }
+
+        return (searchApi);
+    }
+
     /**
      * Gets the ServicesApi instance owned by this GitLabApi instance. The ServicesApi is used
      * to perform all services related API calls.