public override void PreInitialize()
 {
     if (!SkipDbContextRegistration)
     {
         Configuration.Modules.AbpEfCore().AddDbContext <ProcessingDbContext>(options =>
         {
             if (options.ExistingConnection != null)
             {
                 ProcessingDbContextConfigurer.Configure(options.DbContextOptions, options.ExistingConnection);
             }
             else
             {
                 ProcessingDbContextConfigurer.Configure(options.DbContextOptions, options.ConnectionString);
             }
         });
     }
 }