docs: def write(self, b):
          """
          Write the given bytes-like object, b, to the underlying raw stream,
          and return the number of bytes written.
  
          Args:
              b (bytes-like object): Bytes to write.
  
          Returns:
              int: The number of bytes written.
          """
          if not self._writable:
              raise UnsupportedOperation('write')
  
          # This function write data in a buffer
          # "flush()" need to be called to really write content on
          # Cloud Storage
          size = len(b)
          with self._seek_lock:
              start = self._seek
              end = start + size
              self._seek = end
  
          buffer = self._write_buffer
          if end <= len(buffer):
              buffer = memoryview(buffer)
          buffer[start:end] = b
          return size