import okhttp3.internal.checkOffsetAndCount
import okhttp3.internal.chooseCharset
import okio.BufferedSink
import okio.ByteString
import okio.FileSystem
import okio.HashingSink
import okio.Path
import okio.blackholeSink
import okio.buffer
import okio.source

abstract class RequestBody {
  /** Returns the Content-Type header for this body. */
  abstract fun contentType(): MediaType?

  /**

        if (entry.currentEditor != this) {
          return blackholeSink()
        }
        if (!entry.readable) {
          written!![index] = true
        }
        val dirtyFile = entry.dirtyFiles[index]
        val sink: Sink
        try {
          sink = fileSystem.sink(dirtyFile)
        } catch (_: FileNotFoundException) {
          return blackholeSink()
        }
        return FaultHidingSink(sink) {