ASSIGN_LEFT:
Substitutor: <empty substitutor>
Substituted pairs:
{FooAlias2=} Foo <: {FooAlias1=} Foo (Original: {FooAlias2=} Foo <: {FooAlias1=} Foo)

ASSIGN_RIGHT:
Substitutor: <empty substitutor>
Substituted pairs:
{FooAlias2=} Foo <: {FooAlias1=} Foo (Original: {FooAlias2=} Foo <: {FooAlias1=} Foo)

ASSIGN_ALL:
Substitutor: <empty substitutor>
Substituted pairs:
{FooAlias2=} Foo <: {FooAlias1=} Foo (Original: {FooAlias2=} Foo <: {FooAlias1=} Foo)
