$ egrep -r 'opts\.\w+ = ' node_modules
node_modules/hyperdb/test/helpers/create.js:  opts.reduce = reduce
node_modules/hyperdb/test/helpers/create.js:  opts.valueEncoding = opts.valueEncoding || 'utf-8'
node_modules/hyperdb/index.js:  if (opts.firstNode) opts.reduce = reduceFirst
node_modules/hyperdb/index.js:    opts.heads = version
node_modules/hyperdb/index.js:  opts.expectedFeeds = expectedFeeds * factor
node_modules/hyperdb/index.js:  if (!opts.id) opts.id = this.id
node_modules/hyperdb/index.js:  if (!opts.stream) opts.stream = protocol(opts)
node_modules/duplexify/index.js:  opts.objectMode = true
node_modules/duplexify/index.js:  opts.highWaterMark = 16
node_modules/append-tree/index.js:  if (this._offset) opts.start = Math.max(opts.start || 0, this._offset)
node_modules/append-tree/index.js:  if (this._head > -1) opts.end = this._head + 1
node_modules/append-tree/index.js:  opts.valueEncoding = {
node_modules/append-tree/index.js:  if (opts && opts.cached) opts.wait = false
node_modules/append-tree/index.js:  if (opts.wait === undefined) opts.wait = this._wait
node_modules/append-tree/index.js:  if (opts.cached === undefined) opts.cached = this._cached
node_modules/append-tree/index.js:  if (opts.node === undefined) opts.node = this._asNode
node_modules/from2/index.js:  opts.objectMode = true
node_modules/from2/index.js:  opts.highWaterMark = 16
node_modules/hypercore/lib/replicate.js:    if (!opts.expectedFeeds) opts.expectedFeeds = 1
node_modules/hypercore/lib/replicate.js:    if (!opts.id) opts.id = feed.id
node_modules/bulk-write-stream/index.js:  opts.objectMode = true
node_modules/hyperdrive/index.js:  opts.expectedFeeds = 2
node_modules/hyperdrive/index.js:  opts._checkout = this._checkout || this
node_modules/hyperdrive/index.js:  opts.metadata = this.metadata
node_modules/hyperdrive/index.js:  opts.version = version