Explicitly dispose of the buffer that was returned by the last call to writeSync.
If less than bytes bytes were written to the buffer, the number of bytes that were
written must be passed as the written argument.
Write the specified number of bytes to the underlying source.
The implementation is supposed to make sure there are at least bytes bytes
available in the underlying source and return a Uint8Array that can be written to.
The returned Uint8Array must be valid at least until the next call to writeSync
or disposeWriteSync.
If the caller writes less than bytes bytes to the returned Uint8Array,
disposeWriteSync must be called with the number of bytes that were actually written.
The number of bytes to write
Uint8Array of length bytes that can be written to
A synchronous writable stream