KtFile: PackageLongNameBetweenDots.kt
  PACKAGE_DIRECTIVE
    PsiElement(package)('package')
    PsiWhiteSpace(' ')
    PsiErrorElement:Package name must be a '.'-separated identifier list
      PsiElement(DOT)('.')
    DOT_QUALIFIED_EXPRESSION
      DOT_QUALIFIED_EXPRESSION
        REFERENCE_EXPRESSION
          PsiElement(IDENTIFIER)('a')
        PsiElement(DOT)('.')
        REFERENCE_EXPRESSION
          PsiElement(IDENTIFIER)('b')
      PsiElement(DOT)('.')
      REFERENCE_EXPRESSION
        PsiElement(IDENTIFIER)('c')
    PsiElement(DOT)('.')
    PsiErrorElement:Package name must be a '.'-separated identifier list placed on a single line
      <empty list>
  IMPORT_LIST
    <empty list>