`Sources` referenced, but doesn't exist in `pants.engine.target`

[thejcannon]

Reference:

example-plugin/pants-plugins/examples/bash/target_types.py

Line 15 in 1b955ed

Sources,

Should it be SourcesField?

[kaos]

Yes

[kaos]

Eg, no, sorry, it's MultipleSourcesField

[kaos]

And SingleSourceField.. there's two different uses in there..

[thejcannon]

Yeah, I realized after filing this issue that this code needs some TLC <3

[Eric-Arellano]

Yeah, it needs major TLC....I haven't had much time to update it and also know that we probably want to start it all from scratch a la pantsbuild/pants#11825.