innerPadding property
Space between the "inside" of the chart, and the title behavior itself.
This padding is applied to all the edge of the title that is in the direction of the draw area. For a top positioned title, this is applied to the bottom edge. outerPadding is applied to the top, left, and right edges.
If a sub-title is defined, this is the space between the sub-title text and the inside of the chart. Otherwise, it is the space between the title text and the inside of chart.
Implementation
final int? innerPadding;