SHELL_SCRIPT
  COMMANDS_LIST
    SIMPLE_COMMAND
      GENERIC_COMMAND_DIRECTIVE
        LITERAL
          PsiElement(word)('read')
      PsiWhiteSpace(' ')
      LITERAL
        PsiElement(word)('a')
      PsiWhiteSpace(' ')
      LITERAL
        PsiElement(word)('v')
      SIMPLE_COMMAND_ELEMENT
        CONDITIONAL_COMMAND
          PsiElement([)('[')
          LITERAL_CONDITION
            PsiElement(word)('i')
          PsiElement(])(']')