foo -> UMethod (name = foo)
bar -> UParameter (name = bar)
String -> USimpleNameReferenceExpression (identifier = String)
String -> USimpleNameReferenceExpression (identifier = String)
bar -> UMethod (name = bar)
baz -> UMethod (name = baz)
String -> USimpleNameReferenceExpression (identifier = String)
    foo -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
    ?: -> USimpleNameReferenceExpression (identifier = ?:)
    foo -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
    ?: -> USimpleNameReferenceExpression (identifier = ?:)
    bar -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
    toString -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
