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open X, a bidirectional pipe to "ssh myrpcserver.mydomain.com -c /path
+/to/my_rpc_server_code";
print X "my RPC commands";
my $RPC_results = <X>;

use My_Remote_Library; # This hides the RPC stuff in there somewhere

...
# useful manner.  I put no thought into the calling interface,
# it would probably make much more sense in real life, if
# it existed.