public Long getActiveFromTimestamp() {
        return this.activeFromTimestamp;
    }
<p>
Beginning time from which the Changeset is active. The value is determined as epoch time in milliseconds. For
example, the value for Monday, November 1, 2021 12:00:00 PM UTC is specified as 1635768000000.
</p>

@return Beginning time from which the Changeset is active. The value is determined as epoch time in milliseconds.
        For example, the value for Monday, November 1, 2021 12:00:00 PM UTC is specified as 1635768000000.
aws-java-sdk-finspacedata/src/main/java/com/amazonaws/services/finspacedata/model/GetChangesetResult.java