readByte
open fun readByte(cancellable: Cancellable? = null): <Error class: unknown class><<Error class: unknown class>>
Reads an unsigned 8-bit/1-byte value from @stream.
Return
an unsigned 8-bit/1-byte value read from the @stream or 0 if an error occurred.
Parameters
cancellable
optional #GCancellable object, null to ignore.