Function setHeddle

setHeddle(d: Drawdown, i: number, j: number, bool: boolean): Drawdown
sets the heddle at the specified location to the value provided
Parameters
- d: Drawdown
  drawdown
- i: number
  weft
- j: number
  warp
- bool: boolean
  the value (true for up, false for down, null for unset)
Returns Drawdown
- Defined in draft/draft.ts:288