bodyText
fun ERROR CLASS: Symbol not found for NetworkResult<ERROR CLASS: Symbol not found for ResponseBody>.bodyText(): String?
Reads this result's ResponseBody as a UTF-8 string, or returns null when there is no body.
Centralises the single nullable check (NetworkResult.response); source() and readUtf8() are non-null OkHttp calls, so keeping them here avoids repeating unreachable null-safe operators at every call site.