@Override
  public void toData(DataOutput out,
      SerializationContext context) throws IOException {
    // how do we serialize the comparator?
    out.writeBoolean(modifiable);
    out.writeInt(size());
    context.getSerializer().writeObject(structType, out);
    for (Struct struct : this) {
      context.getSerializer().writeObject(struct.getFieldValues(), out);
    }
  }
Setter for property modifiable.

@param modifiable New value of property modifiable.
geode-core/src/main/java/org/apache/geode/cache/query/internal/LinkedStructSet.java