...
Let's take the CloneBytesWritten attribute of the com.atlassian.bitubucket Mbean with the name HttpHostingStatistics:
...
As you can see this attribute is of the long type and the value of the attribute is 12685.
The name of the attribute in Prometheus will be:
bitbucket_jmx_<the folder of the Mbean>_name_<the name of the MBean>_<the name of the attribute>
which is