== no error bars ==
extent -1 to 1
extentSimple -1 to 1
extent445 -1 to 1
== with error bars ==
extent -2 to 2
extentSimple -1 to 1
extent445 -1 to 1
== with bins ==
extent -2 to 2
extentSimple -1 to 1
extent445 -1 to 1
== just bins ==
extent -1 to 2
extentSimple -1 to 2
extent445 -1 to 2
== fill handling failed ==
extent with fill 8.1818182 to 171.8181818 degrees