public String alterSourceConnectorOffset(String connectorName, Map<String, ?> partition, Map<String, ?> offset) {
        return alterConnectorOffsets(
                connectorName,
                new ConnectorOffsets(Collections.singletonList(new ConnectorOffset(partition, offset)))
        );
    }
Alter the offset for a source connector's partition via the <strong><em>PATCH /connectors/{connector}/offsets</em></strong>
endpoint

@param connectorName name of the source connector whose offset is to be altered
@param partition the source partition for which the offset is to be altered
@param offset the source offset to be written

@return the API response as a {@link java.lang.String}
connect/runtime/src/test/java/org/apache/kafka/connect/util/clusters/EmbeddedConnect.java