YM4R Add label to top of marker


Does anyone know how to add a label to the top of a marker. For example
if i have 5 reults for locations and i have them numbered 1-5 then a
number on the top of each marker so its clear which marker belongs to
which location.

Ive read through the ruby docs and googled but cant find any info or
examples on this, is it even possible, i think i seen something like
this before.