Function getWeak

test/fixtures/compile-performance.js:8120–8130

(it, create)

            } return it[META].i;
        };
        var getWeak = function(it, create){
            if(!has(it, META)){
                // can't set metadata to uncaught frozen object
                if(!isExtensible(it))return true;
                // not necessary to add metadata
                if(!create)return false;
                // add missing metadata
                setMeta(it);
                // return hash weak collections IDs
            } return it[META].w;
        };
// add metadata on freeze-family methods calling
        var onFreeze = function(it){
            if(FREEZE && meta.NEED && isExtensible(it) && !has(it, META))setMeta(it);