KtFile: BackslashInString.kt
  PACKAGE_DIRECTIVE
    <empty list>
  IMPORT_LIST
    <empty list>
  FUN
    PsiElement(fun)('fun')
    PsiWhiteSpace(' ')
    PsiElement(IDENTIFIER)('foo')
    VALUE_PARAMETER_LIST
      PsiElement(LPAR)('(')
      PsiElement(RPAR)(')')
    PsiWhiteSpace(' ')
    BLOCK
      PsiElement(LBRACE)('{')
      PsiWhiteSpace('\n    ')
      STRING_TEMPLATE
        PsiElement(OPEN_QUOTE)('"')
        PsiErrorElement:Unexpected token in a string template
          PsiElement(BAD_CHARACTER)('\')
        PsiErrorElement:Expecting '"'
          <empty list>
      PsiWhiteSpace('\n')
      PsiElement(RBRACE)('}')