def query_ary(params, base_response_key, property_key)
      query(params) do |return_val, query|
        return_val.concat(query[base_response_key].collect { |obj| obj[property_key] })
      end
    end
def query_ary(params, base_response_key, property_key)
      query(params) do |return_val, query|
        return_val.concat(query[base_response_key].collect { |obj| obj[property_key] })
      end
    end
Helper method for query methods that return an array built from the query objects.
 @param params [Hash] A hash containing MediaWiki API parameters.
 @param base_response_key [String] The key inside the "query" object to collect.
 @param property_key [String] The key inside the object (under the base_response_key) to collect.