/**
     * @return true if the <b>debug</b> error level is enabled
     */
    boolean isDebugEnabled();

    /**
     * Send a message to the user in the <b>debug</b> error level.
     *
     * @param content
     */
    void debug(CharSequence content);

    /**
     * Send a message (and accompanying exception) to the user in the <b>debug</b> error level.<br>

import org.dbflute.mail.send.SMailDeliveryDepartment;
import org.dbflute.mail.send.SMailPostalMotorbike;
import org.dbflute.mail.send.SMailPostalParkingLot;
import org.dbflute.mail.send.SMailPostalPersonnel;
import org.dbflute.mail.send.embedded.personnel.SMailDogmaticPostalPersonnel;
import org.dbflute.mail.send.embedded.receptionist.SMailConventionReceptionist;
import org.dbflute.mail.send.supplement.async.SMailAsyncStrategy;

        this.streamCloseTimeout = streamCloseTimeout;
    }

    /**
     * Sends a command to the process associated with the given session ID.
     * Uses finer-grained locking to avoid blocking other operations during I/O.
     *
     * @param sessionId unique identifier for the process session
     * @param command the command to send to the process
     * @throws JobNotFoundException if no process is found for the given session ID

        ServerMessageBlock response = new SmbComOpenAndXResponse();

        // Execute send
        tree.send(request, response);

        // Verify session.send was called and tid was set
        verify(session).send(request, response);
        assertEquals(123, request.tid);
    }

    @Test
    void testSendWithDfs() throws SmbException {

            // notification
            try {
                crawler.sendMail(infoMap);
            } catch (final Exception e) {
                logger.warn("Failed to send notification mail.", e);
            }

        }
    }

    /**
     * Sends email notification with crawling results and statistics.
     * The email contains detailed information about the crawling session including

    And this path operation will:

    * Send the invoice to the client.
    * Collect the money from the client.
    * Send a notification back to the API user (the external developer), as a callback.
        * At this point is that the API will somehow send a POST request to the
            external API with the notification of the invoice event
            (e.g. "payment successful").
    """

```mermaid
sequenceDiagram
    participant App
    participant Client

    App->>App: Produce Item 1
    App->>Client: Send Item 1
    App->>App: Produce Item 2
    Client->>Client: Process Item 1
    App->>Client: Send Item 2
    App->>App: Produce Item 3
    Client->>Client: Process Item 2
    App->>Client: Send Item 3
    Client->>Client: Process Item 3
    Note over App: Keeps producing...
    Note over Client: Keeps consuming...

        // Stub tree send for varargs
        when(treeConnection.send(eq(resourceLoc), any(CommonServerMessageBlockRequest.class), isNull(), any(RequestParam[].class)))
                .thenReturn(resp);

        CommonServerMessageBlockResponse out = handle.send(req, RequestParam.NO_RETRY);
        assertSame(resp, out);

        assertFalse(it.hasNext(), "Iterator should be exhausted");

        // Close explicitly to exercise doCloseInternal
        it.close();

        // Verify interactions: one create, two additional directory queries (for fetchMore), one close
        verify(tree, times(1)).send(argThat((Request<?> r) -> r instanceof Smb2CreateRequest));

                curReq = next;
                curResp = next.getResponse();
            }
        }
    }

    /**
     * Sends a request and manages the response handling.
     *
     * @param <T> the response type
     * @param request the request to send
     * @param response the response object to populate
     * @param params additional parameters for the request