import org.yaml.snakeyaml.introspector.MissingProperty; //导入依赖的package包/类
@Override
public Property getProperty(Class<? extends Object> type, String name) throws IntrospectionException
{
    Property result = super.getProperty(type, name);
    if (result instanceof MissingProperty)
    {
        missingProperties.add(result.getName());
    }
    return result;
}
 

import org.yaml.snakeyaml.introspector.MissingProperty; //导入依赖的package包/类
@Override // Print warning for unknown properties
public Property getProperty(Class<?> type, String name, BeanAccess bAccess) throws IntrospectionException {
    if (bAccess != BeanAccess.FIELD) return super.getProperty(type, name, bAccess);
    Property p = super.getProperty(type, Helper.toLowerCase(name), bAccess);
    // Check if property was missing and notify user if necessary
    if ((p instanceof MissingProperty) && type != UnknownConf.class)
        core.getLogger().log(WARN, "Unknown configuration property: {} @ {}", name, type.getSimpleName());
    return p;
}