private void CmdPrepareIcons()
{
if (LocalData.IconLine is null)
{
LocalData.IconLine = LocalTreeFunctions.CmdCreateIconLine();
LocalData.IconItem = LocalTreeFunctions.CmdCreateIconItem();
LocalData.IconLastItem = LocalTreeFunctions.CmdCreateIconLastItem();
LocalData.IconMinus = LocalTreeFunctions.CmdCreateIconMinusOrPlus(true);
LocalData.IconMinusTop = LocalTreeFunctions.CmdCreateIconMinusOrPlusTop(true);
LocalData.IconMinusBottom = LocalTreeFunctions.CmdCreateIconMinusOrPlusBottom(true);
LocalData.IconMinusTopBottom = LocalTreeFunctions.CmdCreateIconMinusOrPlusTopBottom(true);
LocalData.IconPlus = LocalTreeFunctions.CmdCreateIconMinusOrPlus(false);
LocalData.IconPlusTop = LocalTreeFunctions.CmdCreateIconMinusOrPlusTop(false);
LocalData.IconPlusBottom = LocalTreeFunctions.CmdCreateIconMinusOrPlusBottom(false);
LocalData.IconPlusTopBottom = LocalTreeFunctions.CmdCreateIconMinusOrPlusTopBottom(false);
}
}