public static String constructPipeName(String group, int index) {
		return group + GROUP_INDEX_DELIMITER + index;
	}
Construct a pipe name from the group and index.
@param group the group.
@param index the index.
@return the name.
spring-xd-messagebus-spi/src/main/java/org/springframework/xd/dirt/integration/bus/BusUtils.java