ReplaceWith(
          expression = "content.asResponseBody(contentType, contentLength)",
          imports = ["okhttp3.ResponseBody.Companion.asResponseBody"],
        ),
      level = DeprecationLevel.WARNING,
    )
    fun create(
      contentType: MediaType?,
      contentLength: Long,
      content: BufferedSource,
    ): ResponseBody = content.asResponseBody(contentType, contentLength)
  }

| RequestBody.create(File)            | File.asRequestBody()            |
| RequestBody.create(String)          | String.toRequestBody()          |
| ResponseBody.create(BufferedSource) | BufferedSource.asResponseBody() |
| ResponseBody.create(ByteArray)      | ByteArray.toResponseBody()      |
| ResponseBody.create(ByteString)     | ByteString.toResponseBody()     |
| ResponseBody.create(String)         | String.toResponseBody()         |

 */
package okhttp3

import java.io.Closeable
import java.io.IOException
import java.net.HttpURLConnection.HTTP_PROXY_AUTH
import java.net.HttpURLConnection.HTTP_UNAUTHORIZED
import okhttp3.ResponseBody.Companion.asResponseBody
import okhttp3.internal.commonAddHeader
import okhttp3.internal.commonBody
import okhttp3.internal.commonCacheControl
import okhttp3.internal.commonCacheResponse
import okhttp3.internal.commonClose

    responseBody = byteArrayOf(0, 1).toResponseBody("".toMediaType())
    responseBody = byteArrayOf(0, 1).toResponseBody(null)
    responseBody = Buffer().asResponseBody("".toMediaType(), 0L)
    responseBody = Buffer().asResponseBody(null, 0L)
  }

  @Test
  fun route() {
    val route: Route = factory.newRoute()
    val address: Address = route.address
    val proxy: Proxy = route.proxy

## Version 4.0.0-RC2

_2019-06-21_

 *  New: Require Kotlin 1.3.40.
 *  New: Change the Kotlin API from `File.toRequestBody()` to `File.asRequestBody()` and
    `BufferedSource.toResponseBody()` to `BufferedSource.asResponseBody()`. If the returned value
    is a view of what created it, we use _as_.
 *  Fix: Permit response codes of zero for compatibility with OkHttp 3.x.