public List<Token> getHiddenTokensToRight(int tokenIndex) {
		return getHiddenTokensToRight(tokenIndex, -1);
	}
Collect all hidden tokens (any off-default channel) to the right of
 the current token up until we see a token on DEFAULT_TOKEN_CHANNEL
 or EOF.
runtime/Java/src/org/antlr/v4/runtime/BufferedTokenStream.java