Bold-Fill weight?

Not a bug, not an icon: a weight.

Describe the bug I think there should be a Bold + Fill weight for extra consistency.

To Reproduce

1. If you are using Bold vs. Fill to indicate states;
2. If the icon in question has lines in the Fill weight;
3. Then the lines are consistent with the Regular weight, not Bold.

Expected behavior A Bold-Fill weight would be to Bold what Fill is to Regular. (So maybe you should have Light-Fill and Thin-Fill as well? )

Screenshots This clearly shows the inconsistency I am referring to: