diff --git a/loglevel/loglevel-tests.ts b/loglevel/loglevel-tests.ts
index ab19939569..ca1ebc1664 100644
--- a/loglevel/loglevel-tests.ts
+++ b/loglevel/loglevel-tests.ts
@@ -16,6 +16,11 @@ log.setLevel("error", false);
 log.setLevel(LogLevel.WARN);
 log.setLevel(LogLevel.WARN, false);
 
+log.enableAll(false);
+log.enableAll();
+log.disableAll(true);
+log.disableAll();
+
 var logLevel = log.getLevel();
 
 var testLogger = log.getLogger("TestLogger");
@@ -26,3 +31,8 @@ testLogger.warn("logging test");
 var logging = log.noConflict();
 
 logging.error("still pretty easy");
+
+log.methodFactory = function(methodName: string, level: LogLevel, loggerName :string) {
+    return function(...messages: any[]) {
+    };
+};
\ No newline at end of file
diff --git a/loglevel/loglevel.d.ts b/loglevel/loglevel.d.ts
index 0d8352c652..7ccbe89c33 100644
--- a/loglevel/loglevel.d.ts
+++ b/loglevel/loglevel.d.ts
@@ -1,6 +1,6 @@
 // Type definitions for loglevel 1.4.0
 // Project: https://github.com/pimterry/loglevel
-// Definitions by: Stefan Profanter <https://github.com/Pro/>, Florian Wagner <https://github.com/flqw/>
+// Definitions by: Stefan Profanter <https://github.com/Pro/>, Florian Wagner <https://github.com/flqw/>, Gabor Szmetanko <https://github.com/szmeti/>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 /**
@@ -15,8 +15,28 @@ declare const enum LogLevel {
     SILENT = 5
 }
 
+interface LoggingMethod {
+
+    (...message : any[]):void;
+
+}
+
+interface MethodFactory {
+
+    (methodName : string, level : LogLevel, loggerName : string):LoggingMethod;
+
+}
+
 interface Log {
 
+    /**
+     * Plugin API entry point. This will be called for each enabled method each time the level is set 
+     * (including initially), and should return a MethodFactory to be used for the given log method, at the given level, 
+     * for a logger with the given name. If you'd like to retain all the reliability and features of loglevel, it's 
+     * recommended that this wraps the initially provided value of log.methodFactory
+     */
+    methodFactory:MethodFactory;
+
     /**
      * Output trace message to console.
      * This will also include a full stack trace
@@ -135,6 +155,24 @@ interface Log {
      */
     getLogger(name : String):Log;
 
+    /**
+     * This enables all log messages, and is equivalent to log.setLevel("trace").
+     *
+     * @param persist Where possible the log level will be persisted. LocalStorage will be used if available, falling
+     *     back to cookies if not. If neither is available in the current environment (i.e. in Node), or if you pass
+     *     false as the optional 'persist' second argument, persistence will be skipped.
+     */
+    enableAll(persist? : boolean):void;
+
+    /**
+     * This disables all log messages, and is equivalent to log.setLevel("silent").
+     *
+     * @param persist Where possible the log level will be persisted. LocalStorage will be used if available, falling
+     *     back to cookies if not. If neither is available in the current environment (i.e. in Node), or if you pass
+     *     false as the optional 'persist' second argument, persistence will be skipped.
+     */
+    disableAll(persist? : boolean):void;
+
 }
 
 declare var log : Log;