A channel that can write bytes from a sequence of buffers.
A gathering write operation writes, in a single invocation, a
sequence of bytes from one or more of a given sequence of buffers.
Gathering writes are often useful when implementing network protocols or
file formats that, for example, group data into segments consisting of one
or more fixed-length headers followed by a variable-length body. Similar
scattering read operations are defined in the ScatteringByteChannel interface.
extends