DCEndPosTrr<T extends DCEndPosTree> has a method

T setEndPos(int)

so that it can easily be used in chained method calls.

But that flexibility is lost for subtypes of DCInlineTag which is defined as

public abstract static class DCInlineTag extends DCEndPosTree<DCInlineTag> implements InlineTagTree {

In other words, the T in EndPosTree<T> is fixed at DCInlineTag.

We should change DCInlineTag to itself be a generic type.