src/main/java/io/reactivex/internal/util/AppendOnlyLinkedArrayList.java
public void add(T value) {
        final int c = capacity;
        int o = offset;
        if (o == c) {
            Object[] next = new Object[c + 1];
            tail[c] = next;
            tail = next;
            o = 0;
        }
        tail[o] = value;
        offset = o + 1;
    }
public void add(T value) {
        final int c = capacity;
        int o = offset;
        if (o == c) {
            Object[] next = new Object[c + 1];
            tail[c] = next;
            tail = next;
            o = 0;
        }
        tail[o] = value;
        offset = o + 1;
    }
Append a non-null value to the list.
<p>Don't add null to the list!
@param value the value to append