anchor.diff:        "coc-metals"
         "coc-pairs"
         "coc-prettier"
  +      "coc-pyright"
         "coc-python"
  -      "coc-pyright"
         "coc-r-lsp"
         "coc-rls"
         "coc-rust-analyzer"
  
positive.code: } // (
    let
      nodePackageNames = [
        "coc-css"
        "coc-diagnostic"
        "coc-emmet"
  
negative.code:       "coc-solargraph"
        "coc-stylelint"
        "coc-tabnine"
        "coc-texlab"
        "coc-tslint"
        "coc-tslint-plugin"
        "coc-tsserver"
  