make has method const

library/cpp/yaml/fyamlcpp/fyamlcpp.cpp

@@ -417,7 +417,7 @@ void TMapping::Remove(const TNodePairRef& toRemove) {
     free(toRemove.Pair_);
 }
 
-bool TMapping::Has(TString key) {
+bool TMapping::Has(TString key) const {
     return fy_node_mapping_lookup_by_string(Node_, key.data(), key.size()) != nullptr;
 }
 

library/cpp/yaml/fyamlcpp/fyamlcpp.h

@@ -487,7 +487,7 @@ public:
 
     void Remove(const TNodePairRef& toRemove);
 
-    bool Has(TString key);
+    bool Has(TString key) const;
 
     TMappingIterator Remove(const TMappingIterator& toRemove);