KtFile: 1.2.kt
  PACKAGE_DIRECTIVE
    <empty list>
  IMPORT_LIST
    <empty list>
  FUN
    PsiElement(fun)('fun')
    PsiWhiteSpace(' ')
    PsiElement(IDENTIFIER)('case_1')
    VALUE_PARAMETER_LIST
      PsiElement(LPAR)('(')
      PsiElement(RPAR)(')')
    PsiWhiteSpace(' ')
    BLOCK
      PsiElement(LBRACE)('{')
      PsiWhiteSpace('\n    ')
      WHEN
        PsiElement(when)('when')
        PsiWhiteSpace(' ')
        PsiElement(LBRACE)('{')
        PsiWhiteSpace('\n        ')
        WHEN_ENTRY
          WHEN_CONDITION_WITH_EXPRESSION
            PsiErrorElement:Expecting an expression, is-condition or in-condition
              <empty list>
          PsiElement(ARROW)('->')
          PsiWhiteSpace(' ')
          BLOCK
            PsiElement(LBRACE)('{')
            PsiWhiteSpace(' ')
            CALL_EXPRESSION
              REFERENCE_EXPRESSION
                PsiElement(IDENTIFIER)('println')
              VALUE_ARGUMENT_LIST
                PsiElement(LPAR)('(')
                VALUE_ARGUMENT
                  INTEGER_CONSTANT
                    PsiElement(INTEGER_LITERAL)('1')
                PsiElement(RPAR)(')')
            PsiWhiteSpace(' ')
            PsiElement(RBRACE)('}')
        PsiWhiteSpace('\n    ')
        PsiElement(RBRACE)('}')
      PsiWhiteSpace('\n')
      PsiElement(RBRACE)('}')