Method at

chapter24/src/main/java/com/seaofnodes/simple/type/Type.java:226–226

( int idx )

    // At/Set child at 'idx' to t
    Type at ( int idx ) { throw Utils.TODO(); }
    void set( int idx, Type t ) { throw Utils.TODO(); }
    int nkids() { assert _type < TTUPLE; return 0; }   // Number of kids