}

    // Test multiple appends to the same buffer
    @Test
    public void test_multipleAppends() {
        StringBuilder buf = new StringBuilder();

        monitorTarget.append(buf, "key1", () -> "value1");
        buf.append(",");
        monitorTarget.append(buf, "key2", () -> 123);
        buf.append(",");
        monitorTarget.append(buf, "key3", () -> null);

        sb.append(dm).append(includedPaths);
        sb.append(dm).append(intervalTime);
        sb.append(dm).append(maxAccessCount);
        sb.append(dm).append(name);
        sb.append(dm).append(numOfThread);
        sb.append(dm).append(paths);
        sb.append(dm).append(permissions);
        sb.append(dm).append(sortOrder);
        sb.append(dm).append(timeToLive);
        sb.append(dm).append(updatedBy);

            buf.append('"').append(StringEscapeUtils.escapeJson(format)).append('"');
        } else if (value instanceof String[]) {
            final String json = Arrays.stream((String[]) value)
                    .map(s -> "\"" + StringEscapeUtils.escapeJson(s) + "\"")
                    .collect(Collectors.joining(","));
            buf.append('[').append(json).append(']');
        } else if (value instanceof List) {

            buf.append("( lineNumber = ").append(lineNumber).append(", columnNumber = ").append(columnNumber).append(")");
        }
        return new String(buf);
    }

        StringBuilder ret = new StringBuilder().append(this.proto).append(":").append(this.server).append("[").append(this.endpoint);
        if (this.options != null) {
            for (final Entry<String, Object> entry : this.options.entrySet()) {
                ret.append(",").append(entry.getKey()).append("=").append(entry.getValue());
            }
        }
        ret.append("]");
        return ret.toString();
    }

                tempBuf.append(Arrays.toString((double[]) value));
            } else {
                tempBuf.append('"').append(StringEscapeUtils.escapeJson(value.toString())).append('"');
            }
        } catch (final Exception e) {
            tempBuf.append("null");
        }
        buf.append(tempBuf.toString());
        return buf;
    }

    /**
     * Appends a timestamp to the buffer.
     *

        StringBuilder sb = new StringBuilder(128);
        sb.append(artifact.getArtifactId());
        sb.append('-').append(artifact.getBaseVersion());
        if (artifact.getClassifier() != null) {
            sb.append('-').append(artifact.getClassifier());
        }
        sb.append('.').append(artifact.getType()).append(LAST_UPDATE_TAG);
        return new File(artifact.getFile().getParentFile(), sb.toString());

        StringBuilder message = new StringBuilder();
        message.append(action).append(' ').append(direction).append(' ').append(resource.getRepositoryId());
        message.append(": ");
        message.append(resource.getRepositoryUrl())
                .append(resource.getResourceName())
                .append(" (");
        format.format(message, contentLength);

        Duration duration =

        commandWithRetry.append(indent).append("  ").append(command).append(" && \n");
        commandWithRetry.append(indent).append("  exit_code=0 && break || \n");
        commandWithRetry.append(indent);
        commandWithRetry.append("    exit_code=$? && echo \"").append(name).append(" error: retry $iter in 10s\" && sleep 10; \n");
        commandWithRetry.append(indent).append("done; \n");

                .append("],\"graph\": {\"rootNodeId\": \"")
                .append(projectName)
                .append("@0.0.0")
                .append("\",\"nodes\": [")
                .append("{\"nodeId\": \"")
                .append(projectName)
                .append("@0.0.0")
                .append("\",\"pkgId\": \"")
                .append(projectName)
                .append("@0.0.0")