async find(keys, defaultValue) {
        this.checkKeyAndValueTensor(keys, defaultValue);
        const $keys = await keys.data();
        return (0, _tfjsCore.tidy)(()=>{
            const result = [];
            for(let i = 0; i < $keys.length; i++){
                const key = $keys[i];
                const value = this.findWithDefault(key, defaultValue);
                result.push(value);
            }
            return (0, _tfjsCore.stack)(result);
        });
    }
Looks up keys in a hash table, outputs the corresponding values.

Performs batch lookups, for every element in the key tensor, `find`
stacks the corresponding value into the return tensor.

If an element is not present in the table, the given `defaultValue` is
used.

@param keys Keys to look up. Must have the same type as the keys of the
    table.
@param defaultValue The scalar `defaultValue` is the value output for keys
    not present in the table. It must also be of the same type as the
    table values.