public T withWebapp(File webapp) {
		notNull(webapp, "webapp");
		this.webapp = webapp.getAbsolutePath();
		return self();
	}
public T withWebapp(File webapp) {
		notNull(webapp, "webapp");
		this.webapp = webapp.getAbsolutePath();
		return self();
	}
public T withWebapp ( File webapp ) { notNull ( webapp , "webapp" ) ; this . webapp = webapp . getAbsolutePath ( ) ; return self ( ) ; }
Change {@link #webapp} value.

@param webapp New {@link #webapp} value (the absolute path will be used).
@return this
@throws NullPointerException If {@code webapp} is null.
Change { @link #webapp } value .