A cycle within a dependency graph, that is a sequence of dependencies d_1, d_2, ..., d_n where d_1 and d_n have the
same versionless coordinates. In more practical terms, a cycle occurs when a project directly or indirectly depends
on its own output artifact.
This interface is not intended to be extended by clients.
This interface is not intended to be implemented by clients.
Gets the dependencies that actually form the cycle. For example, a -> b -> c -> a, i.e. the last
dependency in this sequence duplicates the first element and closes the cycle. Hence the length of the cycle is
the size of the returned sequence minus 1.
The (read-only) sequence of dependencies that forms the cycle, never null.