package us.myles.ViaVersion.api.protocol;

public class ProtocolVersion {
    /* Defined protocol constants */
    public static int V1_7_1 = 4;
    public static int V1_7_6 = 5;

    public static int V1_8 = 47;

    public static int V1_9 = 107;
    public static int V1_9_1_PRE2 = 108;
}

package us.myles.ViaVersion.api.protocol;

public class ProtocolVersion {
    /* Defined protocol constants */
    public static final int V1_7_1 = 4;
    public static final int V1_7_6 = 5;

    public static final int V1_8 = 47;

    public static final int V1_9 = 107;
    public static final int V1_9_1_PRE2 = 108;
}

Change protocol constants to final fields