kotlin-stdlib / kotlin.native.concurrent / MutableData / append append Native 1.3 fun append(data: MutableData)(source) Appends data to the buffer. Native 1.3 fun append( data: ByteArray, fromIndex: Int = 0, toIndex: Int = data.size)(source) Appends byte array to the buffer. Native 1.3 fun append(data: COpaquePointer?, count: Int)(source) Appends C data to the buffer, if data is null or count is non-positive - return.