code: public static UIComponent resolveComponent(FacesContext context, UIComponent source, String expression) {
  
          return resolveComponent(context, source, expression, SearchExpressionHint.NONE);
      }
docs: Resolves a {@link UIComponent} for the given expression.
  
  @param context The {@link FacesContext}.
  @param source The source component. E.g. a button.
  @param expression The search expression.
  @return A resolved {@link UIComponent} or <code>null</code>.