SHELL_SCRIPT
  COMMANDS_LIST
    INCLUDE_COMMAND
      INCLUDE_DIRECTIVE
        PsiElement(word)('source')
      PsiWhiteSpace(' ')
      LITERAL
        PsiElement(word)('a')
  PsiElement(\n)('\n')
  COMMANDS_LIST
    INCLUDE_COMMAND
      INCLUDE_DIRECTIVE
        PsiElement(word)('source')
      PsiWhiteSpace(' ')
      STRING
        PsiElement(OPEN_QUOTE)('"')
        PsiElement(STRING_CONTENT)('a')
        PsiElement(CLOSE_QUOTE)('"')
  PsiElement(\n)('\n')
  COMMANDS_LIST
    INCLUDE_COMMAND
      INCLUDE_DIRECTIVE
        PsiElement(word)('source')
      PsiWhiteSpace(' ')
      STRING
        PsiElement(OPEN_QUOTE)('"')
        PsiElement(STRING_CONTENT)('a')
        PsiElement(CLOSE_QUOTE)('"')
      PsiWhiteSpace(' ')
      LITERAL
        PsiElement(word)('abc')
      PsiWhiteSpace(' ')
      LITERAL
        PsiElement(word)('def')