@Override
        public boolean equals(Object other) {
            if (other == this) return true;
            if ( ! (other instanceof BindingSpec)) return false;
            return Arrays.equals(((BindingSpec)other).dimensions, this.dimensions);
        }
Returns whether this context contains all the keys of this
container-search/src/main/java/com/yahoo/search/query/profile/compiled/DimensionalValue.java