COMPMID-2856 Add PrintLayer at graph level

Signed-off-by: Giorgio Arena <giorgio.arena@arm.com>
Change-Id: I8f02bb67adae8cc7d884f2417cc9c408985f0d5a
Reviewed-on: https://review.mlplatform.org/c/2546
Reviewed-by: Manuel Bottini <manuel.bottini@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
diff --git a/arm_compute/graph/Utils.h b/arm_compute/graph/Utils.h
index 57a6f14..cb421fc 100644
--- a/arm_compute/graph/Utils.h
+++ b/arm_compute/graph/Utils.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019 ARM Limited.
+ * Copyright (c) 2018-2020 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -34,6 +34,12 @@
 // Forward Declaration
 class GraphContext;
 
+inline bool is_utility_node(INode *node)
+{
+    std::set<NodeType> utility_node_types = { NodeType::PrintLayer };
+    return utility_node_types.find(node->type()) != utility_node_types.end();
+}
+
 /** Returns the tensor descriptor of a given tensor
  *
  * @param[in] g   Graph that the tensor belongs to