Two ideas: Highlight variables across function calls and produce hues of that colour as the variable is consumed by computation into other variables. Colour f

Two ideas: Highlight variables across function calls and produce hues of that colour as the variable is consumed by computation into other variables. Colour functions by how big their test coverage is using flamegraph metadata. My IDE already tells me through colours (lighter hues) and squigglies if a function is transitively unused (when not exported), or a variable is declared but not consumed.