}

fun Request.Builder.commonAddHeader(
  name: String,
  value: String,
) = apply {
  headers.add(name, value)
}

fun Request.Builder.commonRemoveHeader(name: String) =
  apply {
    headers.removeAll(name)
  }

fun Request.Builder.commonHeaders(headers: Headers) =
  apply {
    this.headers = headers.newBuilder()
  }

fun Request.Builder.commonCacheControl(cacheControl: CacheControl): Request.Builder {

 * found, the existing values are replaced.
 */
internal fun Headers.Builder.commonSet(
  name: String,
  value: String,
) = apply {
  headersCheckName(name)
  headersCheckValue(value, name)
  removeAll(name)
  commonAddLenient(name, value)
}

/** Equivalent to `build().get(name)`, but potentially faster. */
internal fun Headers.Builder.commonGet(name: String): String? {

fun Response.Builder.commonAddHeader(
  name: String,
  value: String,
) = apply {
  headers.add(name, value)
}

fun Response.Builder.commonRemoveHeader(name: String) =
  apply {
    headers.removeAll(name)
  }

fun Response.Builder.commonHeaders(headers: Headers) =
  apply {
    this.headers = headers.newBuilder()
  }

fun Response.Builder.commonTrailers(trailersFn: (() -> Headers)) =
  apply {

  fun setHeader(
    name: String,
    value: Any,
  ) = apply {
    removeHeader(name)
    addHeader(name, value)
  }

  fun removeHeader(name: String) =
    apply {
      headersBuilder.removeAll(name)
    }

  fun getBody(): Buffer? = body?.clone()

  fun setBody(body: Buffer) =
    apply {
      setHeader("Content-Length", body.size)
      this.body = body.clone() // Defensive copy.
    }

      if (responseBody != null) {
        val gzipSource = GzipSource(responseBody.source())
        val strippedHeaders =
          networkResponse.headers.newBuilder()
            .removeAll("Content-Encoding")
            .removeAll("Content-Length")
            .build()
        responseBuilder.headers(strippedHeaders)
        val contentType = networkResponse.header("Content-Type")