The command "br --sizes" is likely referring to a command-line utility or a command within a software tool called "br". This specific command is used to display the sizes of different objects or entities within the br tool.
Without further context, it is difficult to determine the specific details of what the "br" tool does or what objects it operates on, but based on the naming convention, it might be related to managing or manipulating resources (denoted by "br", which could represent "resource" or a similar term).
When you run the "br --sizes" command, the tool will likely provide a list or a report displaying the sizes of various items relevant to the context of the tool. These "sizes" may refer to dimensions, file sizes, memory sizes, or any other metric related to the objects the tool deals with.