tfjs-layers - Model.build signature not matching Layer.build (typescript typecheck error)

[jeremychone]

TensorFlow.js version

@tensorflow/tfjs-layers@0.6.2
file: https://github.com/tensorflow/tfjs-layers/blob/master/src/models.ts#L478

Browser version

N/A (node.js)

Describe the problem or feature request

Typescript type check error.
https://github.com/tensorflow/tfjs-layers/blob/master/src/models.ts#L478

Sequential.build(inputShape?: Shape): void incompatible with parent definition Layer.build(inputShape: Shape | Shape[]): void;

Should be
Sequential.build(inputShape?: Shape | Shape[]): void

Code to reproduce the bug / link to feature request

import '@tensorflow/tfjs-node';
import * as tf from '@tensorflow/tfjs';


tf.setBackend('tensorflow');

Then run tsc (assuming tsconfig.json in the project, with strict = true)

and you get

node_modules/@tensorflow/tfjs-layers/dist/models.d.ts(28,5): error TS2416: Property 'build' in type 'Sequential' is not assignable to the same property in base type 'Model'.
  Type '(inputShape?: number[] | undefined) => void' is not assignable to type '(inputShape: number[] | number[][]) => void'.
    Types of parameters 'inputShape' and 'inputShape' are incompatible.
      Type 'number[] | number[][]' is not assignable to type 'number[] | undefined'.
        Type 'number[][]' is not assignable to type 'number[] | undefined'.
          Type 'number[][]' is not assignable to type 'number[]'.
            Type 'number[]' is not assignable to type 'number'.

From vscode:

The easiest way to see this error for end-user is to open the node_modules/@tensorflow/tfjs-layers/dist/models.d.ts in vscode

[caisq]

This should have been fixed by tensorflow/tfjs-layers#215