This is for cases when the chart needs a y-axis min smaller than, or a max larger than, the bounds of the series.
For example, it's quite common to want the chart to have a 0 value on the y-axis, regardless of the data. Also being able to specify the max gives the caller a chance to create a range that has 'sensible' rounded tick values on the y-axis.
Coverage increased (+1.0%) to 100.0% when pulling 7c72b334521ef55e749ba508187b2adf3688dc66 on jamesgpearce:patch-3 into cc5ddc62d3a1c7995e2c5a8950f30360582eefca on kroitor:master.
This is for cases when the chart needs a y-axis min smaller than, or a max larger than, the bounds of the series.
For example, it's quite common to want the chart to have a 0 value on the y-axis, regardless of the data. Also being able to specify the max gives the caller a chance to create a range that has 'sensible' rounded tick values on the y-axis.