Upgrade from 4.4 to 4.5

In 4.4 version i used [skipMigration] and [skipMigrationOnUpdate] attributes for migrations in my local plugin. But in 4.5 version i can't find them. What should i do?

you can use MigrationProcessType at nop v4.50

[NopMigration("2020/07/30 12:00:00", "Nop.Plugin.MultiFactorAuth.GoogleAuthenticator schema", MigrationProcessType.Installation)]

 public enum MigrationProcessType
    {
        /// <summary>
        /// The type of migration process does not matter
        /// </summary>
        NoMatter,

        /// <summary>
        /// Installation
        /// </summary>
        Installation,

        /// <summary>
        /// Update
        /// </summary>
        Update
    }