public void setMigrationTimestamp(java.util.Date migrationTimestamp) {
        this.migrationTimestamp = migrationTimestamp;
    }
<p>
The date and time that the migration started.
</p>

@param migrationTimestamp
       The date and time that the migration started.
aws-java-sdk-lexmodelbuilding/src/main/java/com/amazonaws/services/lexmodelbuilding/model/MigrationSummary.java