def delete(pattern)      
      Klass.removeKey(@handle, (pattern.kind_of?(Regexp) ? pattern.source : pattern.to_s))
      true
    end
def delete(pattern)      
      Klass.removeKey(@handle, (pattern.kind_of?(Regexp) ? pattern.source : pattern.to_s))
      true
    end
Removes a set of keys from the dictionary

 @return [Boolean] returns true or raises an error