public void setTimeZone(String timeZone) {
        if (StringUtils.isNullOrWhitespaceOnly(timeZone)){
            return;
        }
        timeZoneCheck(timeZone);
        this.timeZone = timeZone;
    }
Reason:
Date: 2018/6/25
Company: www.dtstack.com
@author xuchao
core/src/main/java/com/dtstack/flink/sql/table/AbstractSourceTableInfo.java