Added convenience method for setting an automatically generated corre…

…lation ID to `DittoHeaders`'s builder.

Signed-off-by: Juergen Fickel <juergen.fickel@bosch-si.com>

model/base/src/main/java/org/eclipse/ditto/model/base/headers/DittoHeadersBuilder.java

@@ -14,6 +14,7 @@
 
 import java.util.Collection;
 import java.util.Map;
+import java.util.UUID;
 
 import javax.annotation.Nullable;
 import javax.annotation.concurrent.NotThreadSafe;
@@ -43,6 +44,15 @@ public interface DittoHeadersBuilder<B extends DittoHeadersBuilder, R extends Di
      */
     B correlationId(@Nullable CharSequence correlationId);
 
+    /**
+     * Sets a generated random correlation ID.
+     *
+     * @return this builder for Method Chaining.
+     */
+    default B randomCorrelationId() {
+        return correlationId(String.valueOf(UUID.randomUUID()));
+    }
+
     /**
      * Sets the specified String as source of the command.
      *