src/vs/base/common/diff/diffChange.ts/DiffChange/constructor
class DiffChange:	constructor(originalStart: number, originalLength: number, modifiedStart: number, modifiedLength: number) {
		//Debug.Assert(originalLength > 0 || modifiedLength > 0, "originalLength and modifiedLength cannot both be <= 0");
		this.originalStart = originalStart;
		this.originalLength = originalLength;
		this.modifiedStart = modifiedStart;
		this.modifiedLength = modifiedLength;
	}