UnityEditor.ColumnView.DoListColumn C# (CSharp) Method

        private int DoListColumn(ListViewState listView, List<ColumnViewElement> columnViewElements, int columnIndex, int selectedIndex, ObjectColumnFunction selectedSearchItemFunction, ObjectColumnFunction selectedRegularItemFunction, ObjectColumnGetDataFunction getDataForDraggingFunction)
        {
            if (((Event.current.type == EventType.KeyDown) && (Event.current.keyCode == KeyCode.Return)) && (listView.row > -1))
            {
                if (this.isSearching && (selectedSearchItemFunction != null))
                {
                    this.DoSearchItemSelectedEvent(selectedSearchItemFunction, columnViewElements[selectedIndex].value);
                }
                if ((!this.isSearching && (GUIUtility.keyboardControl == listView.ID)) && (selectedRegularItemFunction != null))
                {
                    DoItemSelectedEvent(selectedRegularItemFunction, columnViewElements[selectedIndex].value);
                }
            }
            if (((GUIUtility.keyboardControl == listView.ID) && (Event.current.type == EventType.KeyDown)) && !this.isSearching)
            {
                switch (Event.current.keyCode)
                {
                    case KeyCode.LeftArrow:
                        this.m_ColumnToFocusKeyboard = columnIndex - 1;
                        Event.current.Use();
                        break;

                    case KeyCode.RightArrow:
                        this.m_ColumnToFocusKeyboard = columnIndex + 1;
                        Event.current.Use();
                        break;
                }
            }
            GUILayoutOption[] options = new GUILayoutOption[] { GUILayout.Width(this.columnWidth) };
            IEnumerator enumerator = ListViewGUILayout.ListView(listView, s_Styles.background, options).GetEnumerator();
            try
            {
                while (enumerator.MoveNext())
                {
                    ListViewElement current = (ListViewElement) enumerator.Current;
                    ColumnViewElement columnViewElement = columnViewElements[current.row];
                    if ((current.row == listView.row) && (Event.current.type == EventType.Repaint))
                    {
                        Rect position = current.position;
                        position.x++;
                        position.y++;
                        s_Styles.selected.Draw(position, false, true, true, GUIUtility.keyboardControl == listView.ID);
                    }
                    GUILayout.Label(columnViewElement.name, new GUILayoutOption[0]);
                    if (columnViewElement.value is List<ColumnViewElement>)
                    {
                        Rect rect2 = current.position;
                        rect2.x = (rect2.xMax - s_Styles.categoryArrowIcon.width) - 5f;
                        rect2.y += 2f;
                        GUI.Label(rect2, s_Styles.categoryArrowIcon);
                    }
                    this.DoDoubleClick(current, columnViewElement, selectedSearchItemFunction, selectedRegularItemFunction);
                    DoDragAndDrop(listView, current, columnViewElements, getDataForDraggingFunction);
                }
            }
            finally
            {
                IDisposable disposable = enumerator as IDisposable;
                if (disposable != null)
                {
                    disposable.Dispose();
                }
            }
            if (Event.current.type == EventType.Layout)
            {
                selectedIndex = listView.row;
            }
            return selectedIndex;
        }