jodd-http/src/main/java/jodd/http/Buffer.java
public Buffer append(final Uploadable uploadable) {
		list.add(uploadable);
		size += uploadable.getSize();
		last = null;
		return this;
	}
public Buffer append(final Uploadable uploadable) {
		list.add(uploadable);
		size += uploadable.getSize();
		last = null;
		return this;
	}
Appends {@link jodd.http.up.Uploadable} to buffer.