var fnDecls map[*types.Func]*ast.FuncDecl // computed lazily
	return func(f *types.Func) *ast.FuncDecl {
		if f != nil && fnDecls == nil {
			fnDecls = make(map[*types.Func]*ast.FuncDecl)
			for _, file := range files {
				for _, decl := range file.Decls {
					if fnDecl, ok := decl.(*ast.FuncDecl); ok {
						if fn, ok := info.Defs[fnDecl.Name].(*types.Func); ok {
							fnDecls[fn] = fnDecl

					}
				}
			}
			return true
		})
	}

	return nil, nil
}

func hasBenchmarkOrTestParams(fnDecl *ast.FuncDecl) bool {
	// Check that the function's arguments include "*testing.T" or "*testing.B".
	params := fnDecl.Type.Params.List

	for _, param := range params {
		if _, ok := typeIsTestingDotTOrB(param.Type); ok {
			return true
		}
	}

	return false