src/vs/workbench/contrib/debug/common/debugModel.ts/DebugModel/addFunctionBreakpoint
class DebugModel:	addFunctionBreakpoint(functionName: string, id?: string): IFunctionBreakpoint {
		const newFunctionBreakpoint = new FunctionBreakpoint(functionName, true, undefined, undefined, undefined, id);
		this.functionBreakpoints.push(newFunctionBreakpoint);
		this._onDidChangeBreakpoints.fire({ added: [newFunctionBreakpoint], sessionOnly: false });

		return newFunctionBreakpoint;
	}