Method ExampleST

tests/test_holders.cpp:37–37

struct ExampleST : std::enable_shared_from_this<ExampleST> {
    int value;
    ExampleST(int value) : value(value) { created++; }
    ~ExampleST() { deleted++; }

    static ExampleST *make(int value) { return new ExampleST(value); }