src/main/java/com/cedarsoftware/util/io/JsonWriter.java
private void tab(Writer output, int delta) throws IOException
    {
        if (!isPrettyPrint)
        {
            return;
        }
        output.write(NEW_LINE);
        depth += delta;
        for (int i=0; i < depth; i++)
        {
            output.write("  ");
        }
    }
private void tab(Writer output, int delta) throws IOException
    {
        if (!isPrettyPrint)
        {
            return;
        }
        output.write(NEW_LINE);
        depth += delta;
        for (int i=0; i < depth; i++)
        {
            output.write("  ");
        }
    }
tab the JSON output by the given number of characters specified by delta.
@param output Writer being used for JSON outpt.
@param delta int number of characters to tab.
@throws IOException