in log4j-converter-config/src/main/java/org/apache/logging/converter/config/internal/v1/appender/AbstractAppenderParser.java [138:151]
protected ConfigurationNodeBuilder addStandardChildren(ConfigurationNodeBuilder builder) {
if (threshold != null) {
filters.add(0, newThresholdFilter(threshold));
}
if (!filters.isEmpty()) {
builder.addChild(filters.size() > 1 ? newCompositeFilter(filters) : filters.get(0));
}
if (layout != null) {
builder.addChild(layout);
} else if (requiresLayout) {
throw new ConfigurationConverterException("No layout provided for appender " + name);
}
return builder;
}