KtFile: TopLevelProperty.kt
  PACKAGE_DIRECTIVE
    <empty list>
  IMPORT_LIST
    <empty list>
  PROPERTY
    PsiElement(val)('val')
    PsiWhiteSpace(' ')
    PsiElement(IDENTIFIER)('p')
    PsiElement(COLON)(':')
    PsiWhiteSpace(' ')
    TYPE_REFERENCE
      USER_TYPE
        REFERENCE_EXPRESSION
          PsiElement(IDENTIFIER)('Int')
    PsiWhiteSpace(' ')
    PROPERTY_DELEGATE
      PsiElement(by)('by')
      PsiWhiteSpace(' ')
      CALL_EXPRESSION
        REFERENCE_EXPRESSION
          PsiElement(IDENTIFIER)('A')
        VALUE_ARGUMENT_LIST
          PsiElement(LPAR)('(')
          PsiElement(RPAR)(')')