jill/src/main/java/io/github/agentsoz/jill/util/Stack255.java
public Object pop() {
    if (isEmpty()) {
      return null;
    }
    size--;
    Object obj = objects[size];
    objects[size] = null;
    return obj;
  }
public Object pop() {
    if (isEmpty()) {
      return null;
    }
    size--;
    Object obj = objects[size];
    objects[size] = null;
    return obj;
  }
Pops the Object at the top of the stack.

@return the Object, or null if the stack is empty