This class is designed for plugins to
implement.
Clients of @PublicSpi can expect
that programs compiled against a given version will remain binary compatible with later versions of the
@PublicSpi as per each product's API policy (clients should refer to each product's API policy for
the exact guarantee -- usually binary compatibility is guaranteed at least across minor versions).
Note:
@PublicSpi interfaces and classes are specifically designed to be implemented/extended by clients.
Hence, the guarantee of binary compatibility is different to that of
@PublicApi elements (if an element
is both
@PublicApi and
@PublicSpi, both guarantees apply).
Known Direct Subclasses
