function saveOriginal(v, opts) {
    if (opts.originalValue === undefined) {
        opts.originalValue = v;
    }
}
/**
 * Install a value on an options object as `originalValue` for later reference, if an
 * originalValue key has not already been set.
 *
 * @param v - value to store.
 * @param {Object} opts - object on which the value can be stored.
 */
Install a value on an options object as `originalValue` for later reference, if an
originalValue key has not already been set.

@param v - value to store.
@param {Object} opts - object on which the value can be stored.
Install a value on an options object as ` originalValue ` for later reference if an originalValue key has not already been set . @param v - value to store . @param { Object } opts - object on which the value can be stored .
function saveOriginal(v, opts) {
    if (opts.originalValue === undefined) {
        opts.originalValue = v;
    }
}
function saveOriginal ( v , opts ) { if ( opts . originalValue === undefined ) { opts . originalValue = v ; } }
Install a value on an options object as `originalValue` for later reference, if an
 originalValue key has not already been set.
Install a value on an options object as ` originalValue ` for later reference if an originalValue key has not already been set .