src/vs/editor/common/viewLayout/viewLineRenderer.ts/RenderLineOutput/constructor
class RenderLineOutput:	constructor(characterMapping: CharacterMapping, containsRTL: boolean, containsForeignElements: ForeignElementType) {
		this.characterMapping = characterMapping;
		this.containsRTL = containsRTL;
		this.containsForeignElements = containsForeignElements;
	}