JetFile: PackageLongNameDoubleID.kt
  PACKAGE_DIRECTIVE
    PsiElement(package)('package')
    PsiWhiteSpace(' ')
    REFERENCE_EXPRESSION
      PsiElement(IDENTIFIER)('a')
  IMPORT_LIST
    <empty list>
  PsiWhiteSpace(' ')
  MODIFIER_LIST
    PsiErrorElement:Use '@' symbol before annotations
      <empty list>
    ANNOTATION_ENTRY
      CONSTRUCTOR_CALLEE
        TYPE_REFERENCE
          USER_TYPE
            REFERENCE_EXPRESSION
              PsiElement(IDENTIFIER)('b')
  PsiErrorElement:Expecting a top level declaration
    <empty list>