ASSIGN_LEFT:
Substitutor: <empty substitutor>
Substituted pairs:
{FooAlias=} Foo <: Foo (Original: {FooAlias=} Foo <: Foo)

ASSIGN_RIGHT:
Substitutor: <empty substitutor>
Substituted pairs:
{FooAlias=} Foo <: Foo (Original: {FooAlias=} Foo <: Foo)

ASSIGN_ALL:
Substitutor: <empty substitutor>
Substituted pairs:
{FooAlias=} Foo <: Foo (Original: {FooAlias=} Foo <: Foo)
