characters to terminate the read
length of stop_chars, or -1 if stop_chars is nul-terminated
the [IO priority][iface@Gio.AsyncResult#io-priority] of the request
a Dex.Future that resolves to a string containing the read data, not including the stop character, or null if the end of the stream is reached.
Reads data from the stream until one of
stop_charsis found.Wraps Gio.DataInputStream.read_upto_async.