Issue #53: turns out that visitor and filesytem proxy (file system leaf node) need to have special handling ... we want to accept the proxied leaf node, but we need to pass in the proxy ... TDFileSystemLeafNode in this case ... The TDProxyLeafNode is working fine
`gs version` command ... edits `System gemversionReport`
bullet proof TDMethodDefinition class>>referencesTo:isMeta:in: