Returns the names of every backend registered with register_backend(),
available on this system or not. Each one is a valid method value of
every condathis function that takes method, besides "auto". The
built-in "micromamba" backend is always registered.
Details
A backend whose package condathis knows, such as "rattler" of the
rattlerthis package, is also a valid method value when its package
is installed but not loaded yet. condathis loads the package on first
use (see Registering from a backend package in register_backend()).
It is listed here once it is loaded. The error for an invalid method
value names these backends too.
See also
Other backends:
backend_root_dir(),
register_backend(),
unregister_backend()