The cache directory must be exclusively owned by a single instance.

Deleting the cache when it is no longer needed can be done.  However this may delete the purpose of the cache
which is designed to persist between app restarts.

```kotlin
cache.delete()
```
 
## Pruning the Cache

Pruning the entire Cache to clear space temporarily can be done using evictAll.

```kotlin
cache.evictAll()
```

   * [reader]. For example, if the reader's peeked tag isn't readable by this adapter, it may return
   * a default value.
   *
   * If this does read a value, it starts with the tag and length, and reads an entire value,
   * including any potential composed values.
   *
   * If there's nothing to read and no default value, this will throw an exception.
   */

 *  New: `Response.byteString()` reads the entire response into memory as a byte string.
 *  New: `OkHttpClient.x509TrustManager` accessor.
 *  New: Permit [new WebSocket response codes][iana_websocket]: 1012 (Service Restart), 1013 (Try
    Again Later), and 1014 (invalid response from the upstream).
 *  New: Build with Kotlin 1.3.41, BouncyCastle 1.62, and Conscrypt 2.2.1.

    }

    // Optimization: check whether hostname is too short to match the pattern. hostName must be at
    // least as long as the pattern because asterisk must match the whole left-most label and
    // hostname starts with a non-empty label. Thus, asterisk has to match one or more characters.
    if (hostname.length < pattern.length) {
      return false // Hostname too short to match the pattern.
    }

    if ("*." == pattern) {

 *    IP address (`74.122.190.80`), or a hostname pattern (`*.api.squareup.com`).
 *
 *  * **A validity interval.** A certificate should not be used before its validity interval starts
 *    or after it ends.
 *
 *  * **A public key.** This cryptographic key is used for asymmetric encryption digital signatures.
 *    Note that the private key is not a part of the certificate!
 *

  public synchronized void awaitAccessToken(Timeout timeout) throws InterruptedIOException {
    while (session == null) {
      timeout.waitUntilNotified(this);
    }
  }

  /** Starts a real time messaging session. */
  public void startRtm() throws IOException {
    String accessToken;
    synchronized (this) {
      accessToken = session.access_token;
    }

   * possibility for your response.
   */
  @Throws(IOException::class)
  fun byteString() = commonByteString()

  /**
   * Returns the response as a character stream.
   *
   * If the response starts with a
   * [Byte Order Mark (BOM)](https://en.wikipedia.org/wiki/Byte_order_mark), it is consumed and
   * used to determine the charset of the response bytes.
   *

[2020-01-01 00:00:00] << 0x00000003     0 DATA          END_STREAM
[2020-01-01 00:00:00] << 0x00000000     8 GOAWAY
[2020-01-01 00:00:05] << 0x00000000     8 GOAWAY
```

### Task Runner Logging 

This logs task enqueues, starts, and finishes.

```
[2020-01-01 00:00:00] Q10000 scheduled after   0 µs: OkHttp ConnectionPool
[2020-01-01 00:00:00] Q10000 starting              : OkHttp ConnectionPool

 * Race TCP only. Only attempt a TLS handshake on the winning TCP connection.

import org.junit.jupiter.api.Test

class CipherSuiteTest {
  @Test
  fun hashCode_usesIdentityHashCode_legacyCase() {
    val cs = CipherSuite.TLS_RSA_EXPORT_WITH_RC4_40_MD5 // This one's javaName starts with "SSL_".
    assertThat(cs.hashCode(), cs.toString())
      .isEqualTo(System.identityHashCode(cs))
  }

  @Test
  fun hashCode_usesIdentityHashCode_regularCase() {