txlcn-tracing/src/main/java/com/codingapi/txlcn/tracing/TracingContext.java
public boolean hasGroup() {
        return Objects.nonNull(fields) && fields.containsKey(TracingConstants.GROUP_ID) &&
                StringUtils.hasText(fields.get(TracingConstants.GROUP_ID));
    }
public boolean hasGroup() {
        return Objects.nonNull(fields) && fields.containsKey(TracingConstants.GROUP_ID) &&
                StringUtils.hasText(fields.get(TracingConstants.GROUP_ID));
    }
判断是否有事务组

@return result