ReportTimespan in MetricReportDefinition

Hi,

ReportTimespan - Timespan duration.

Scenario

________

User does not give this property at the time of creation of a MetricReportDefintion and patches it at a later period of time.

In this case, should reporttimespan take the value from the current time that the user patches or from the created time of the MetricRerpotDefinition for the given duration in this property's value.

"ReportTimespan": {
"description": "Specifies the timespan duration of the metric report.",
"longDescription": "This property shall specify the timespan duration that this metric report covers.",
"pattern": "-?P(\\d+D)?(T(\\d+H)?(\\d+M)?(\\d+(.\\d+)?S)?)?",
"readonly": false,
"type": [
"string",
"null"
],
"versionAdded": "v1_3_0"
}