public void setWriteBufferLowWaterMark(final Integer writeBufferLowWaterMark) {
        this.writeBufferLowWaterMark = writeBufferLowWaterMark;
    }
set writeBufferLowWaterMark.

@param writeBufferLowWaterMark write buffer low water mark
shenyu-common/src/main/java/org/apache/shenyu/common/config/NettyChannelProperties.java