SHELL_SCRIPT
  COMMANDS_LIST
    SIMPLE_COMMAND
      GENERIC_COMMAND_DIRECTIVE
        LITERAL
          PsiElement(word)('x')
      PsiWhiteSpace(' ')
      SIMPLE_COMMAND_ELEMENT
        HEREDOC
          PsiElement(HEREDOC_MARKER_TAG)('<<')
          PsiWhiteSpace(' ')
          PsiElement(HEREDOC_MARKER_START)('!')
          PsiElement(\n)('\n')
          PsiElement(HEREDOC_CONTENT)('  Text\n')
          PsiElement(HEREDOC_MARKER_END)('!')