return other is Challenge &&
    other.scheme == scheme &&
    other.authParams == authParams
}

fun Challenge.commonHashCode(): Int {
  var result = 29
  result = 31 * result + scheme.hashCode()
  result = 31 * result + authParams.hashCode()
  return result
}

    for ((key, value) in authParams) {
      val newKey = key?.lowercase(US)
      newAuthParams[newKey] = value
    }
    this.authParams = unmodifiableMap<String?, String>(newAuthParams)
  }

  /** Returns a copy of this charset that expects a credential encoded with [charset]. */
  fun withCharset(charset: Charset): Challenge {
    val authParams = this.authParams.toMutableMap()

| Params     | Value    |
| :--        | :--      |
| *Type*     | *String* |
| *Required* | *Yes*    |

### AUTHPARAMS