in src/main/java/org/apache/maven/doxia/wrapper/OutputStreamWrapper.java [78:85]
public static OutputStreamWrapper valueOf(OutputStream out, String format, String encoding) {
Objects.requireNonNull(out, "output writer is required");
if (format == null || format.isEmpty()) {
throw new IllegalArgumentException("output format is required");
}
return new OutputStreamWrapper(out, format, encoding);
}