padding property
An immutable set of offsets in each of the four cardinal directions. Typically used for an offset from each of the four sides of a box. For example, the padding inside a box can be represented using this class. The EdgeInsets class specifies offsets in terms of visual edges, left, top, right, and bottom. These values are not affected by the TextDirection. To support both left-to-right and right-to-left layouts, consider using EdgeInsetsDirectional, which is expressed in terms of start, top, end, and bottom, where start and end are resolved in terms of a TextDirection (typically obtained from the ambient Directionality).
Implementation
final EdgeInsetsGeometry? padding;