final static boolean isDoubleEscaped(String messagePattern,
                                         int delimeterStartIndex) {
        if (delimeterStartIndex >= 2
                && messagePattern.charAt(delimeterStartIndex - 2) == ESCAPE_CHAR) {
            return true;
        } else {
            return false;
        }
    }
Same principle as the {@link #format(String, Object)} and
{@link #format(String, Object, Object)} methods except that any number of
arguments can be passed in an array.

@param messagePattern
         The message pattern which will be parsed and formatted
@param argArray
         An array of arguments to be substituted in place of formatting
         anchors
@return The formatted message
lts-core/src/main/java/com/github/ltsopensource/core/logger/support/MessageFormatter.java