@Override
    public String toString() {
        return "BeanMap<" + bean + ">";
    }
Constructs a new {@code BeanMap} that operates on the
specified bean.  If the given bean is {@code null}, then
this map will be empty.

@param bean the bean for this map to operate on
querydsl-core/src/main/java/com/querydsl/core/util/BeanMap.java