Issue of using UVM_VERBOSITY

In reply to dave_59:

In reply to verified:
The UVM verbosity level does not change the detail of a message. It changes the number of messages that get through to display. When the UVM_VERBOSITY is set to UVM_LOW, only the info messages with UVM_LOW and UVM_NONE get through. When UVM_VERBOSIT is set to UVM_MEDIUM, only messages with UVM_MEDIUM, UVM_LOW and UVM_NONE get through.

Thanks for letting me know that.

Can User make a custom function with user own VERBOSITY?
Where can I find any snippet code of VERBOSITY definition in UVM?