`dependents` doesn't discover functions for Builtin types

[stew]

when I am in the base project and I run > dependents reflection.Link.Term I expect the results to contain functions which mention reflection.Link.Term in their type signatures, such as Code.lookup and Value.load and Code.dependencies but these are not included in the results.

My suspicion is that the problem is that either the type or the missing terms are builtins.