foo -> UMethod (name = foo)
String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
    s -> [!] UnknownKotlinExpression (PROPERTY)
    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
    s -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
    !! -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
