2.4.4.338 SoftEdgesSize
The SoftEdgesSize cell is a vLength custom token grouping that specifies the size of the soft edge in the effect properties of a shape. It MUST have a ShapeSheet_Type or StyleSheet_Type parent element.
The value of the structure MUST be greater than or equal to zero, and less than or equal to (100.0 / 72.0) inches. The value of zero specifies the shape doesn’t have soft edges.