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I would like to exchange data and / or call methods of another UI component. How can I access another UI component in Magento 2 knockout JS ?

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List all components

var registry = require('uiRegistry');
registry.filter(function(value,key) {  console.log(key);
    // console.log(value); 
 });

Get a specific one

registry.get('checkout.steps.billing-step.payment.payments-list.paypal_express.checkout.steps.billing-step.payment.payments-list.paypal_express.messages');

This is meant for debugging and might not be the best way to communicate between components.

From: http://devdocs.magento.com/guides/v2.1/ui_comp_guide/concepts/ui_comp_uiregistry.html

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