This might be possible, hence posing as question. Is there a way within a certain YAML/JSON CFN context to list schema-legal sub-attributes?
As an example, if I have an AWS::EC2::Instance resource and I go to Properties: (YAML), I get useful autocomplete suggestions when I type 'a', 'b', etc, but the ability to see an entire list of legal properties would be helpful to me.
If this isn't currently possible but is something that would better be a request to redhat.vscode-yaml please let me know and I'll go do so.