// property laf = "crossplatform", "system", "gtk", "metal" or "mac"
// If not set (or chosen laf fails), use the normal SystemLaF and if on Mac,
// try Quaqua/Vaqua.
// property laf = "crossplatform", "system", "gtk", "metal" or "mac"
// If not set (or chosen laf fails), use the normal SystemLaF and if on Mac,
// try Quaqua/Vaqua.