readAvailable

override fun readAvailable(dst: ByteArray, offset: Int, length: Int): Int
override fun readAvailable(dst: IoBuffer, length: Int): Int
override fun readAvailable(dst: ShortArray, offset: Int, length: Int): Int
override fun readAvailable(dst: IntArray, offset: Int, length: Int): Int
override fun readAvailable(dst: LongArray, offset: Int, length: Int): Int
override fun readAvailable(dst: FloatArray, offset: Int, length: Int): Int
override fun readAvailable(dst: DoubleArray, offset: Int, length: Int): Int