PsiJetFileStubImpl[package=]
  PACKAGE_DIRECTIVE
  IMPORT_LIST
    IMPORT_DIRECTIVE[importedFqName=kotlin.contracts, isAllUnder=true, isValid=true]
      DOT_QUALIFIED_EXPRESSION
        REFERENCE_EXPRESSION[referencedName=kotlin]
        REFERENCE_EXPRESSION[referencedName=contracts]
  CLASS[classId=/A, fqName=A, isClsStubCompiledToJvmDefaultImplementation=false, isEnumEntry=false, isInterface=true, isLocal=false, isTopLevel=true, name=A, superNames=[]]
    CLASS_BODY
      FUN[fqName=A.foo, hasBody=false, hasNoExpressionBody=true, hasTypeParameterListBeforeFunctionName=false, isExtension=false, isTopLevel=false, mayHaveContract=false, name=foo]
        VALUE_PARAMETER_LIST
  PROPERTY[fqName=isNotNull, hasBackingField=null, hasDelegate=false, hasDelegateExpression=false, hasInitializer=false, hasReturnTypeRef=true, isExtension=true, isTopLevel=true, isVar=true, name=isNotNull]
    MODIFIER_LIST[]
      ANNOTATION_ENTRY[hasValueArguments=true, shortName=OptIn]
        CONSTRUCTOR_CALLEE
          TYPE_REFERENCE
            USER_TYPE
              REFERENCE_EXPRESSION[referencedName=OptIn]
        VALUE_ARGUMENT_LIST
          VALUE_ARGUMENT[isSpread=false]
            CLASS_LITERAL_EXPRESSION
              REFERENCE_EXPRESSION[referencedName=ExperimentalContracts]
    TYPE_REFERENCE
      NULLABLE_TYPE
        USER_TYPE
          REFERENCE_EXPRESSION[referencedName=Any]
    TYPE_REFERENCE
      USER_TYPE
        REFERENCE_EXPRESSION[referencedName=Boolean]
    PROPERTY_ACCESSOR[hasBody=true, hasNoExpressionBody=true, isGetter=true, mayHaveContract=true]
      VALUE_PARAMETER_LIST
    PROPERTY_ACCESSOR[hasBody=true, hasNoExpressionBody=true, isGetter=false, mayHaveContract=true]
      VALUE_PARAMETER_LIST
        VALUE_PARAMETER[fqName=null, hasDefaultValue=false, hasValOrVar=false, isMutable=false, name=value]
