src/vs/editor/common/viewModel/modelLineProjection.ts/ModelLineProjection/normalizePosition
class ModelLineProjection:	public normalizePosition(outputLineIndex: number, outputPosition: Position, affinity: PositionAffinity): Position {
		const baseViewLineNumber = outputPosition.lineNumber - outputLineIndex;
		const normalizedOutputPosition = this._projectionData.normalizeOutputPosition(outputLineIndex, outputPosition.column - 1, affinity);
		const result = normalizedOutputPosition.toPosition(baseViewLineNumber);
		return result;
	}