# Functions
Compare returns an integer comparing two SeriesGenerator instances lexicographically.
NewIntegerZipfValuesSequence produces int64 values using a Zipfian distribution described by s.
WalkDown performs a pre-order, depth-first traversal of the graph, calling v for each node.
WalkUp performs a post-order, depth-first traversal of the graph, calling v for each node.
# Type aliases
NewTimeValuesSequenceFn returns a TimeValuesSequence that will generate a sequence of values based on the spec.