public static String inputJson(String... lines) {
        return Joiner.on("\n").join(lines).replaceAll("'", "\"");
    }
Convenience method to input JSON without escaping double quotes and newlines
Each parameter represents a line of JSON encoded data
The lines are joined with newline and single quotes are replaced with double quotes
testutil/src/main/java/com/yahoo/test/json/JsonTestHelper.java