VOL-1900 lint warning fixes rw_core

Change-Id: Icaa84d7ce24163da90c91ff2babcbb78ff4e9141
diff --git a/rw_core/coreif/logical_device_agent_if.go b/rw_core/coreif/logical_device_agent_if.go
new file mode 100644
index 0000000..34a71e5
--- /dev/null
+++ b/rw_core/coreif/logical_device_agent_if.go
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+  Defines a logicalDeviceAgent Interface - Used for unit testing of the flow decomposer only at this
+ time.
+*/
+
+package coreif
+
+import (
+	"github.com/opencord/voltha-go/rw_core/graph"
+	"github.com/opencord/voltha-protos/v2/go/voltha"
+)
+
+// LogicalDeviceAgent represents a generic agent
+type LogicalDeviceAgent interface {
+	GetLogicalDevice() (*voltha.LogicalDevice, error)
+	GetDeviceGraph() *graph.DeviceGraph
+	GetWildcardInputPorts(excludePort ...uint32) []uint32
+	GetRoute(ingressPortNo uint32, egressPortNo uint32) []graph.RouteHop
+}