private void button2_Click(object sender, EventArgs e)
        {
            var objSelector   = new PluginObjectSelector();
            var subAssemblies = objSelector.GetSelectedSubAssemblies();
            var saNumerator   = new SubAssemblyNumerator();

            saNumerator.ClearNumbers(subAssemblies);
        }
        private void button3_Click(object sender, EventArgs e)
        {
            var parseResult = int.TryParse(SAStartNumberTextBox.Text, out int initialMarkNumber);

            if (parseResult)
            {
                var objSelector   = new PluginObjectSelector();
                var subAssemblies = objSelector.GetSelectedSubAssemblies();
                var saNumerator   = new SubAssemblyNumerator();
                saNumerator.ProjectCode   = projectCodeTextBox.Text;
                saNumerator.InitialNumber = initialMarkNumber;
                saNumerator.Number(subAssemblies);
            }
        }