JetFile: single.kt
  FILE_ANNOTATION_LIST
    ANNOTATION_ENTRY
      PsiElement(AT)('@')
      ANNOTATION_TARGET
        PsiElement(file)('file')
      PsiElement(COLON)(':')
      CONSTRUCTOR_CALLEE
        TYPE_REFERENCE
          USER_TYPE
            REFERENCE_EXPRESSION
              PsiElement(IDENTIFIER)('foo')
  PsiWhiteSpace('\n')
  PACKAGE_DIRECTIVE
    PsiElement(package)('package')
    PsiWhiteSpace(' ')
    REFERENCE_EXPRESSION
      PsiElement(IDENTIFIER)('bar')
  IMPORT_LIST
    <empty list>