Function cell_part_class 

pub fn cell_part_class(part: CellPart) -> &'static str

The class for a cell part.

part_class’s table half, added with makeover-layout 0.14.0’s CellPart. The fallback is there for the same reason and costs the same thing: a member added upstream lands as a bare cell-part with no rule of its own, rather than as a build that stops. Grep this function too when adopting a new makeover-layout, and public since 0.27.0 for the reason part_class is.