public Builder setTimestamp(long value) {
            copyOnWrite();
            instance.setTimestamp(value);
            return this;
        }
<pre>
Common =&gt; [1, 3]
</pre>

<code>int64 timestamp = 1;</code>

@param value The timestamp to set.
@return This builder for chaining.
turms-client-kotlin/src/main/java/im/turms/client/model/proto/notification/TurmsNotification.java