@Nonnull
    default MessageBuilder a(Object value) {
        return append(String.valueOf(value));
    }

    /**
     * Append newline to the message buffer.
     *
     * @return the current builder
     */
    @Nonnull
    default MessageBuilder newline() {
        return append(System.lineSeparator());
    }

    /**
     * Append formatted content to the buffer.

java.io.FilterReader { public static final String DEFAULT_START_DELIM = ${; public static final String DEFAULT_END_DELIM = }; public static final String DEFAULT_ESCAPE_SEQ = \; private static final char CARRIAGE_RETURN_CHAR = 13; private static final char NEWLINE_CHAR = 10; private final java.io.PushbackReader pushbackReader; private final java.util.Map context; private final String startDelim; private final String endDelim; private final String escapeSeq; private final int minExpressionSize; private final...