Test cases with real sagittarius data

[nicosammito]

1. Currently value suggestion is not properly working. It can handle direct types, but not referenced types.
2. Node suggestions are not currently suggesting only the function that the parameter type actually is. For parameters that take in a function itself it doesn't suggest everything.
3. Validation is really broken. Especially with nested node functions
4. Variables aren't suggested in any way. just on the same level, but this is totally wrong.