public ListGroupsResult withGroups(Group... groups) {
        if (this.groups == null) {
            setGroups(new com.amazonaws.internal.SdkInternalList<Group>(groups.length));
        }
        for (Group ele : groups) {
            this.groups.add(ele);
        }
        return this;
    }
<p>
A list of groups.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setGroups(java.util.Collection)} or {@link #withGroups(java.util.Collection)} if you want to override the
existing values.
</p>

@param groups
       A list of groups.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-iam/src/main/java/com/amazonaws/services/identitymanagement/model/ListGroupsResult.java