src/vs/workbench/contrib/notebook/common/model/notebookCellTextModel.ts/NotebookCellTextModel/getHashValue
class NotebookCellTextModel:	getHashValue(): number {
		if (this._hash !== null) {
			return this._hash;
		}

		this._hash = hash([hash(this.language), hash(this.getValue()), this._getPersisentMetadata(), this.transientOptions.transientOutputs ? [] : this._outputs.map(op => ({
			outputs: op.outputs,
			metadata: op.metadata
		}))]);
		return this._hash;
	}