public GroupConfiguration withProposedConfiguration(GroupConfigurationItem... proposedConfiguration) {
        if (this.proposedConfiguration == null) {
            setProposedConfiguration(new java.util.ArrayList<GroupConfigurationItem>(proposedConfiguration.length));
        }
        for (GroupConfigurationItem ele : proposedConfiguration) {
            this.proposedConfiguration.add(ele);
        }
        return this;
    }
<p>
If present, the new configuration that is in the process of being applied to the group.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setProposedConfiguration(java.util.Collection)} or
{@link #withProposedConfiguration(java.util.Collection)} if you want to override the existing values.
</p>

@param proposedConfiguration
       If present, the new configuration that is in the process of being applied to the group.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-resourcegroups/src/main/java/com/amazonaws/services/resourcegroups/model/GroupConfiguration.java