TS2512

error TS2512: Overload signatures must all be abstract or non-abstract.

Broken Code ❌

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export abstract class MovingAverage {
  update(prices: BigSource[]): Big | void;

  abstract update(price: BigSource): Big | void;
}

Fixed Code ✔️

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export abstract class MovingAverage {
  abstract update(prices: BigSource[]): Big | void;

  abstract update(price: BigSource): Big | void;
}