Gets or sets a component that contributes its System.ComponentModel.Design.DesignerActionMethodItem objects to the current panel.
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The DesignerActionPropertyItem.RelatedComponent property allows another component to lend its smart tag panel items to the current list. For example, a user control might aggregate the items from one of its constituent standard controls.
This property works in conjunction with the DesignerActionItem.AllowAssociate property.