Why is the SharedConfig type manually altered in this plugin?

[dmg-egg]

Note the commented-out properties in the interface definition, here:

vite-plugin-federation/packages/lib/types/index.d.ts

Line 260 in 38fc6b2

declare interface SharedConfig {

Compare to the same type in the Module Federation library: https://github.com/module-federation/core/blob/779aa42803f50c3a5a6289ac40c0961240e37a89/packages/sdk/src/types/plugins/SharePlugin.ts#L69

The notably for us, the singleton property is commented out. Is there some reason that property shouldn't work in this implementation?