code: public boolean getValueBoolean() throws NullPointerException {
  		if (current == State.VALUE_BOOLEAN) {
  			return valueBoolean;
  		} else if (current == State.VALUE_NULL) {
  			return false;
  		} else {
  			throw new IllegalStateException("unexpected state. state=" + current);
  		}
  	}
docs: Get the current value as boolean.<br>
  
  <p>
  Please call if {@link JsonPullParser#getEventType()} returns {@link State#VALUE_BOOLEAN}.
  </p>
  
  @return The current value read as boolean.
  @throws NullPointerException The current value is null ({@link #getEventType()} returns {@link State#VALUE_NULL}.)