public static boolean isNext(final Buffer buffer, final byte b) throws IOException {
        if (buffer.hasReadableBytes()) {
            final byte actual = buffer.peekByte();
            return actual == b;
        }

        return false;
    }
public static boolean isNext ( final Buffer buffer , final byte b ) throws IOException { if ( buffer . hasReadableBytes ( ) ) { final byte actual = buffer . peekByte ( ) ; return actual == b ; } return false ; }
Will check whether the next readable byte in the buffer is a certain byte

@param buffer
the buffer to peek into
@param b
the byte we are checking is the next byte in the buffer to be
read
@return true if the next byte to read indeed is what we hope it is