i.e. if params.fuseOpts.threshold is 0.0 or params.fuseOpts.ignorelocation is false, the default values of 0.4 and true will still be used.
i.e. if params.fuseOpts.threshold is 0.0 or params.fuseOpts.ignorelocation is false, the default values of 0.4 and true will still be used.