This is the v1 version, had the v2 before.

commands/close.go

@@ -0,0 +1,18 @@
+package commands
+
+import (
+	"github.com/emersion/go-imap"
+)
+
+// Close is a CLOSE command, as defined in RFC 3501 section 6.4.2.
+type Close struct{}
+
+func (cmd *Close) Command() *imap.Command {
+	return &imap.Command{
+		Name: "CLOSE",
+	}
+}
+
+func (cmd *Close) Parse(fields []interface{}) error {
+	return nil
+}