'Initialize Prometheus Metrics.'

def __init__(self, prometheus_client, exclude, include):

    self.prometheus_client = prometheus_client
    self.exclude = (exclude.get(CONF_ENTITIES, []) + exclude.get(CONF_DOMAINS, []))
    self.include_domains = include.get(CONF_DOMAINS, [])
    self.include_entities = include.get(CONF_ENTITIES, [])
    self._metrics = {}
