+ /**
+ * When set, we commit to an upfront shutdown_pubkey at channel open. If our counterparty
+ * supports it, they will then enforce the mutual-close output to us matches what we provided
+ * at intialization, preventing us from closing to an alternate pubkey.
+ *
+ * This is set to true by default to provide a slight increase in security, though ultimately
+ * any attacker who is able to take control of a channel can just as easily send the funds via
+ * lightning payments, so we never require that our counterparties support this option.
+ *
+ * This cannot be changed after a channel has been initialized.
+ *
+ * Default value: true.
+ */