void () { assertArrayEquals(IElementType.EMPTY_ARRAY, TokenSet.EMPTY.getTypes()); assertArrayEquals(new IElementType[]{T1, T2}, S12.getTypes()); assertArrayEquals(new IElementType[]{T3, T4}, S34.getTypes()); assertEquals("[]", TokenSet.EMPTY.toString()); assertEquals("[T1, T2]", S12.toString()); assertEquals("[T3, T4]", S34.toString()); }