src/vs/workbench/contrib/tasks/common/tasks.ts/ContributedTask/constructor
class ContributedTask:	public constructor(id: string, source: ExtensionTaskSource, label: string, type: string | undefined, defines: KeyedTaskIdentifier,
		command: CommandConfiguration, hasDefinedMatchers: boolean, runOptions: RunOptions,
		configurationProperties: ConfigurationProperties) {
		super(id, label, type, runOptions, configurationProperties, source);
		this.defines = defines;
		this.hasDefinedMatchers = hasDefinedMatchers;
		this.command = command;
	}