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Stack Overflow Custom Adapter for Salesforce Connect
This example illustrates how to support external lookup relationships and multiple
tables. An external lookup relationship links a child standard, custom, or external object
to a parent external object. Each table can become an external object in the Salesforce
org.
For this example to work, create a custom field on the Contact standard object. Name the custom field “github_username” and select the External ID and Unique attributes.