-------- @implements E --------
empty interface type main.E

-------- @implements F --------
interface type main.F
	is implemented by pointer type *main.C
	is implemented by struct type main.D
	is implemented by interface type main.FG

-------- @implements FG --------
interface type main.FG
	is implemented by pointer type *main.D
	implements main.F

-------- @implements slice --------
slice type []int implements only interface{}

-------- @implements C --------
pointer type *main.C
	implements main.F

-------- @implements starC --------
pointer type *main.C
	implements main.F

-------- @implements D --------
struct type main.D
	implements main.F
pointer type *main.D
	implements main.FG

-------- @implements starD --------
pointer type *main.D
	implements main.F
	implements main.FG

-------- @implements sorter --------
slice type main.sorter
	implements sort.Interface

-------- @implements I --------
interface type main.I
	is implemented by basic type lib.Type