"protocols must not contain null"
        }

        // Remove protocols that we no longer support.
        @Suppress("DEPRECATION")
        protocolsCopy.remove(Protocol.SPDY_3)

        if (protocolsCopy != this.protocols) {
          this.routeDatabase = null
        }

        // Assign as an unmodifiable list. This is effectively immutable.

	public static final field HTTP_2 Lokhttp3/Protocol;
	public static final field HTTP_3 Lokhttp3/Protocol;
	public static final field QUIC Lokhttp3/Protocol;
	public static final field SPDY_3 Lokhttp3/Protocol;
	public static final fun get (Ljava/lang/String;)Lokhttp3/Protocol;
	public static fun getEntries ()Lkotlin/enums/EnumEntries;
	public fun toString ()Ljava/lang/String;