src/vs/editor/common/viewModel/modelLineProjection.ts/ModelLineProjection/getViewLineNumberOfModelPosition
class ModelLineProjection:	public getViewLineNumberOfModelPosition(deltaLineNumber: number, inputColumn: number): number {
		this._assertVisible();
		const r = this._projectionData.translateToOutputPosition(inputColumn - 1);
		return deltaLineNumber + r.outputLineIndex;
	}