src/vs/editor/common/viewModel.ts/OverviewRulerDecorationsGroup/constructor
class OverviewRulerDecorationsGroup:	constructor(
		public readonly color: string,
		public readonly zIndex: number,
		/**
		 * Decorations are encoded in a number array using the following scheme:
		 *  - 3*i = lane
		 *  - 3*i+1 = startLineNumber
		 *  - 3*i+2 = endLineNumber
		 */
		public readonly data: number[]
	) { }