private static void initStrongWhitespaceHolder(CommonParentState commonParent, ASTNode start, boolean slopeSide) {
    if (start instanceof CompositeElement &&
        (isStrongWhitespaceHolder(start.getElementType()) || slopeSide && start.getUserData(UNCLOSED_ELEMENT_PROPERTY) != null)) {
      commonParent.strongWhiteSpaceHolder = (CompositeElement)start;
      commonParent.isStrongElementOnRisingSlope = slopeSide;
    }
  }
private static void initStrongWhitespaceHolder(CommonParentState commonParent, ASTNode start, boolean slopeSide)