How to use defaults of Get parameters in schema?

[eslamsalahelsheikh]

Hi all,
I'm trying to recieve Get query parameters with defined schema as in here but somehow the defaults don't work unless I explicity write them outside the scheam like @param.query.number('pageSizes') pageSize = 5. And Looking at the loopback parser, there's nothing for inserting default values for parameters. Is it a bug or is there a documentation on how to do it?
Thanks in advance.