static CodedOutput newInstance(final byte[] flatArray, final ComputedSizeOutput computedSize)
    {
        return new CodedOutput(flatArray, 0, flatArray.length, computedSize, false);
    }
Create a new {@code CodedOutput} that writes directly to the given byte array. If more bytes are written than fit
in the array, {@link OutOfSpaceException} will be thrown. Writing directly to a flat array is faster than writing
to an {@code OutputStream}.
protostuff-core/src/test/java/io/protostuff/CodedOutput.java