private boolean isNextTokenAdjacent() {
		if (tokenStreamPointer >= tokenStreamLength) {
			return false;
		}
		Token last = tokenStream.get(tokenStreamPointer - 1);
		Token next = tokenStream.get(tokenStreamPointer);
		return next.startpos == last.endpos;
	}
Return the concatenation of the data of many tokens.
spring-xd-dirt/src/main/java/org/springframework/xd/dirt/stream/dsl/StreamConfigParser.java