public boolean equals(Object o) {
        if (!(o instanceof MapFieldValue m)) return false;
        if (size() != m.size()) return false;
        if ( ! super.equals(m)) return false;
        return entrySet().equals(m.entrySet());
    }
Checks if another object is equal to this set.

@param o the object to check for equality with
@return true if o is an instance of WeightedSet and the two encapsulated Maps are equal, false otherwise
document/src/main/java/com/yahoo/document/datatypes/MapFieldValue.java