Check method GetResourceContext(type) returns null

[farturi]

Check if method GetResourceContext(type) returns null before returning Relationships

Closes #{ISSUE_NUMBER}

QUALITY CHECKLIST

• Changes implemented in code
• Adapted tests
• Documentation updated
• Created issue to update Templates: {ISSUE_NUMBER}

[bart-degreed]

This is a breaking change. Where the call would have failed before, it now silently hides the error. What's the reason for changing this?

[farturi]

Hi Bart, this is to fix this problem:
#924

[bart-degreed]

I appreciate that you're trying to help, but I think this is not the right solution. Instead, the caller should be changed to not send an invalid type.