public class DistributionData
This class represents the structure of a timing distribution according to the pipeline schema. It is meant to help serialize and deserialize data to the correct format for transport and storage, as well as including a helper function to calculate the bucket sizes.
@param values a map containing the bucket index mapped to the accumulated count @param sum the accumulated sum of all the samples in the timing distribution
Parse the distribution data from the given JSON string.
If the string is not valid JSON or data is missing
public init?(fromJson json: String)