Method find

chapter21/src/main/java/com/seaofnodes/simple/codegen/LRG.java:87–92

()

    // Fast-path Find from the Union-Find algorithm
    LRG find() {
        if( _leader==null ) return this; // I am the leader
        if( _leader._leader==null ) // I point to the leader
            return _leader;
        return _rollup();
    }
    // Slow-path rollup of U-F
    private LRG _rollup() {
        LRG ldr = _leader._leader;