YAML file: AliasInKey.yml
  PsiComment(comment)('# This test data is duplicated in parser and lexer tests')
  YAML document
    PsiElement(Eol)('\n')
    YAML mapping
      YAML key value
        PsiElement(scalar key)('topics')
        PsiElement(:)(':')
        PsiWhiteSpace(' ')
        YAML array
          PsiElement([)('[')
          YAML sequence item
            YAML plain scalar text
              YAML anchor
                PsiElement(&)('&')
                PsiElement(anchor)('place')
              PsiWhiteSpace(' ')
              PsiElement(text)('City')
          PsiElement(,)(',')
          PsiWhiteSpace(' ')
          YAML sequence item
            YAML plain scalar text
              YAML anchor
                PsiElement(&)('&')
                PsiElement(anchor)('lang')
              PsiWhiteSpace(' ')
              PsiElement(text)('Language')
          PsiElement(])(']')
      PsiElement(Eol)('\n')
      YAML key value
        YAML alias
          PsiElement(*)('*')
          PsiElement(alias)('place')
        PsiElement(:)(':')
        PsiWhiteSpace(' ')
        YAML plain scalar text
          PsiElement(text)('Spb')
      PsiElement(Eol)('\n')
      YAML key value
        YAML alias
          PsiElement(*)('*')
          PsiElement(alias)('lang')
        PsiWhiteSpace(' ')
        PsiElement(:)(':')
        PsiWhiteSpace(' ')
        YAML plain scalar text
          YAML anchor
            PsiElement(&)('&')
            PsiElement(anchor)('rus')
          PsiWhiteSpace(' ')
          PsiElement(text)('Russia')
      PsiElement(Eol)('\n')
      YAML key value
        YAML alias
          PsiElement(*)('*')
          PsiElement(alias)('rus')
        PsiElement(:)(':')