Function hitTestDivider

hitTestDivider(
    point: number,
    dividerPositions: readonly number[],
    dividerSize?: number,
): number | null
Hit test to determine if a point is on a divider.
Parameters
- point: number
  Point position (x for horizontal, y for vertical)
- dividerPositions: readonly number[]
  Divider positions
- dividerSize: number = DEFAULT_DIVIDER_SIZE
  Divider size in cells
Returns number | null
Divider index if hit, null otherwise
- Defined in core/src/widgets/splitPane.ts:327