Make Graph::IsValidNode public

It can be reimplemented with existing public APIs, but instead of doing so,
making this one public seems better.

PiperOrigin-RevId: 166407897

1 files changed, 3 insertions, 3 deletions

diff --git a/tensorflow/core/graph/graph.cc b/tensorflow/core/graph/graph.cc
index 241e093eea..7d938365c5 100644
--- a/tensorflow/core/graph/graph.cc
+++ b/tensorflow/core/graph/graph.cc
@@ -503,17 +503,17 @@ string Graph::NewName(StringPiece prefix) {
   return strings::StrCat(prefix, "/_", name_counter_++);
 }
 
-Status Graph::IsValidNode(Node* node) const {
+Status Graph::IsValidNode(const Node* node) const {
   if (node == nullptr) {
     return errors::InvalidArgument("Node is null");
   }
   const int id = node->id();
   if (id < 0) {
-    return errors::InvalidArgument("node id ", id, "is less than zero");
+    return errors::InvalidArgument("node id ", id, " is less than zero");
   }
   if (static_cast<size_t>(id) >= nodes_.size()) {
     return errors::InvalidArgument(
-        "node id ", id, "is >= than number of nodes in graph ", nodes_.size());
+        "node id ", id, " is >= than number of nodes in graph ", nodes_.size());
   }
   if (nodes_[id] != node) {
     return errors::InvalidArgument("Node with id ", id,