My organisation has a managed package DevABC which has a namespace prefix Dev_ABC. I created a SFDX project using manifest. I authorized the org using the system administrator. Now, when I tried to retrieve the source in manifest from org, I do not see an apex classes or lightning components. I even tried using force.source.retrieve and force.mdapi.retrieve commands but wasn't able to retrieve anything.
I updated my package.xml file as well to include Dev_ABC__* instead of * in the members tag but I get warnings like these:
Entity of type 'ApexClass' named 'Dev_ABC__*' cannot be found Not sure what exactly I am missing!