Do not override contains() method which is present is STL

util/generic/map.h

@@ -21,10 +21,6 @@ public:
     inline explicit operator bool() const noexcept {
         return !this->empty();
     }
-
-    inline bool contains(const K& key) const {
-        return this->find(key) != this->end();
-    }
 };
 
 template <class K, class V, class Less, class A>
@@ -37,8 +33,4 @@ public:
     inline explicit operator bool() const noexcept {
         return !this->empty();
     }
-
-    inline bool contains(const K& key) const {
-        return this->find(key) != this->end();
-    }
 };

util/generic/set.h

@@ -18,11 +18,6 @@ public:
     inline explicit operator bool() const noexcept {
         return !this->empty();
     }
-
-    template <class TheKey>
-    inline bool contains(const TheKey& key) const {
-        return this->find(key) != this->end();
-    }
 };
 
 template <class K, class L, class A>
@@ -34,9 +29,4 @@ public:
     inline explicit operator bool() const noexcept {
         return !this->empty();
     }
-
-    template <class TheKey>
-    inline bool contains(const TheKey& key) const {
-        return this->find(key) != this->end();
-    }
 };