- * Optionally specify a SecKeychainRef, or an array of them, containing
- * intermediate certs to be used in verifying a signed message's signer
- * certs. By default, the default keychain search list is used for this.
- * Specify an empty CFArrayRef to search *no* keychains for intermediate
- * certs.
- * IF this is called, it must be called before CMSDecoderCopySignerStatus().
+ * Beginning in 10.12, this function stopped affecting the behavior of the
+ * CMS Decoder. Its only use was in SecTrustSetKeychains which is a no-op.
+ * Please discontinue use.