def METHOD_NAME(metrics_source_name: Optional[pulumi.Input[str]] = None,
                              monitor_name: Optional[pulumi.Input[str]] = None,
                              resource_group_name: Optional[pulumi.Input[str]] = None,
                              opts: Optional[pulumi.InvokeOptions] = None) -> pulumi.Output[GetMetricsSourceResult]:
    """
    Use this data source to access information about an existing resource.
    :param str metrics_source_name: Metrics Account resource name
    :param str monitor_name: Monitor resource name
    :param str resource_group_name: The name of the resource group. The name is case insensitive.
    """
    ...