src/main/java/j2html/tags/ContainerTag.java
public ContainerTag with(Iterable<? extends DomContent> children) {
        if (children != null) {
            for (DomContent child : children) {
                this.with(child);
            }
        }
        return this;
    }
public ContainerTag with(Iterable<? extends DomContent> children) {
        if (children != null) {
            for (DomContent child : children) {
                this.with(child);
            }
        }
        return this;
    }
Appends a list of DomContent-objects to the end of this element

@param children DomContent-objects to be appended
@return itself for easy chaining