public String toSmallString() {
    return "GatewaySenderEventImpl[" + "id=" + id + ";operation="
        + getOperation() + ";region=" + regionPath + ";key="
        + key + ";shadowKey=" + shadowKey + ";bucketId="
        + bucketId + "]";
  }
If the value owned of this event is just bytes return that byte array; otherwise serialize the
value object and return the serialized bytes. Use {@link #getValueIsObject()} to determine if
the result is raw or serialized bytes.
geode-core/src/main/java/org/apache/geode/internal/cache/wan/GatewaySenderEventImpl.java