src/vs/editor/browser/viewParts/minimap/minimap.ts/ContiguousLineMap/set
class ContiguousLineMap:	public set(lineNumber: number, value: T): void {
		if (lineNumber < this._startLineNumber || lineNumber > this._endLineNumber) {
			return;
		}
		this._values[lineNumber - this._startLineNumber] = value;
	}