public void setFeature(String name, boolean state) throws IllegalArgumentException,
            IllegalStateException {
        if (name.equals("http://xmlpull.org/v1/doc/features.html#indent-output")) {
            mIndent = true;
            return;
        }
        throw new UnsupportedOperationException();
    }
Allocate a FastXmlSerializer with the given internal output buffer size.  If the
size is zero or negative, then the default buffer size will be used.

@param bufferSize Size in bytes of the in-memory output buffer that the writer will use.
android/android_framework/base/src/main/java/github/tornaco/android/thanos/core/util/FastXmlSerializer.java