test.ts

type StringOnly<T> = { [K in keyof T as T[K] extends string ? K : never]: T[K] };

function useTable<T extends { name: string }>(
  records: T[] 
) {
  return useTableWithCustomKey(records,'name');
}
function useTableForName(records: { name: string }[]) {
  return useTableWithCustomKey(records,'name');
}
function useTableWithCustomKey<T>(
  records: T[], 
  keyName: keyof StringOnly<T>
) {}