class Rcov::CallSiteAnalyzer

def callsites(classname_or_fullname, methodname = nil)

analyzer.callsites("#", "g1")
analyzer.callsites("Foo", "f1")
or
analyzer.callsites("Foo.g1") # singleton method of the class
analyzer.callsites("Foo#f1") # instance method
Can be called in two ways:
Returns a hash with CallSite => call count associations or +nil+ 
def callsites(classname_or_fullname, methodname = nil)
  rawsites = raw_data_relative.first[expand_name(classname_or_fullname, methodname)]
  return nil unless rawsites
  ret = {}
  # could be a job for inject but it's slow and I don't mind the extra loc
  rawsites.each_pair do |backtrace, count|
    ret[CallSite.new(backtrace)] = count
  end
  ret
end