PRBool IsOnlyWhiteSpace(nsIContent* aContent)
IsOnlyWhiteSpace(nsIContent* aContent)
PRBool IsOnlyWhiteSpace(nsIContent* aContent){  PRBool onlyWhiteSpace = PR_FALSE;  if (aContent->IsContentOfType(nsIContent::eTEXT)) {    nsCOMPtr<nsITextContent> textContent = do_QueryInterface(aContent);    if (textContent) {      textContent->IsOnlyWhitespace(&onlyWhiteSpace);    }  }  return onlyWhiteSpace;}