TODO shorter name
Check if T is castable to U.
Check if R is indexable by I.
Check if R is indexable by I.
Instantiator for IndexedBy.
Instantiator for IndexedBy.
Instantiator for IndexedBy.
Instantiator for Nullable.
Instantiator for Nullable.
Instantiator for NullableRef.
Wrapper for R with Type-Safe I-Indexing. See also: http://forum.dlang.org/thread/gayfjaslyairnzrygbvh@forum.dlang.org#post-gayfjaslyairnzrygbvh:40forum.dlang.org
See also: http://forum.dlang.org/thread/jwdbjlobbilowlnpdzzo@forum.dlang.org