Renamed undocumented function isUndefined() to isUnbound()

src/ArduinoJson/Document/JsonDocument.hpp

@@ -139,14 +139,14 @@ class JsonDocument : public Visitable {
   // containsKey(const __FlashStringHelper*) const
   template <typename TChar>
   bool containsKey(TChar* key) const {
-    return !getMember(key).isUndefined();
+    return !getMember(key).isUnbound();
   }
 
   // containsKey(const std::string&) const
   // containsKey(const String&) const
   template <typename TString>
   bool containsKey(const TString& key) const {
-    return !getMember(key).isUndefined();
+    return !getMember(key).isUnbound();
   }
 
   // operator[](const std::string&)

src/ArduinoJson/Object/ObjectImpl.hpp

@@ -40,14 +40,14 @@ template <typename TObject>
 template <typename TString>
 inline typename enable_if<IsString<TString>::value, bool>::type
 ObjectShortcuts<TObject>::containsKey(const TString& key) const {
-  return !impl()->getMember(key).isUndefined();
+  return !impl()->getMember(key).isUnbound();
 }
 
 template <typename TObject>
 template <typename TChar>
 inline typename enable_if<IsString<TChar*>::value, bool>::type
 ObjectShortcuts<TObject>::containsKey(TChar* key) const {
-  return !impl()->getMember(key).isUndefined();
+  return !impl()->getMember(key).isUnbound();
 }
 
 template <typename TObject>

src/ArduinoJson/Object/ObjectRef.hpp

@@ -77,7 +77,7 @@ class ObjectConstRef : public ObjectRefBase<const CollectionData>,
   // containsKey(const String&) const
   template <typename TString>
   FORCE_INLINE bool containsKey(const TString& key) const {
-    return !getMember(key).isUndefined();
+    return !getMember(key).isUnbound();
   }
 
   // containsKey(char*) const
@@ -85,7 +85,7 @@ class ObjectConstRef : public ObjectRefBase<const CollectionData>,
   // containsKey(const __FlashStringHelper*) const
   template <typename TChar>
   FORCE_INLINE bool containsKey(TChar* key) const {
-    return !getMember(key).isUndefined();
+    return !getMember(key).isUnbound();
   }
 
   // getMember(const std::string&) const

src/ArduinoJson/Variant/VariantOperators.hpp

@@ -17,7 +17,7 @@ CompareResult compare(const T1 &lhs, const T2 &rhs);  // VariantCompare.cpp
 
 template <typename TVariant>
 struct VariantOperators {
-  // Returns the default value if the VariantRef is undefined or incompatible
+  // Returns the default value if the VariantRef is unbound or incompatible
   //
   // int operator|(JsonVariant, int)
   // float operator|(JsonVariant, float)

src/ArduinoJson/Variant/VariantRef.hpp

@@ -32,7 +32,7 @@ class VariantRefBase : public VariantTag {
     return variantIsNull(_data);
   }
 
-  FORCE_INLINE bool isUndefined() const {
+  FORCE_INLINE bool isUnbound() const {
     return !_data;
   }