Attempts to update the existing vertex’s ‘PossibilitySet` with a filtered version @return [void]
(see Gem::Resolver::Molinillo::SpecificationProvider#name_for_locking_dependency_source)
Gem::Resolver::Molinillo::SpecificationProvider#name_for_locking_dependency_source
Ensures any raised {NoSuchDependencyError} has its {NoSuchDependencyError#required_by} set. @yield