foramt parameter for exporters.
This module defines the prometheus_format behaviour.
Required callback functions: content_type/0, format/0, format/1.
Module that implements this behaviour can be used
as foramt parameter for exporters.
Built-in formats:
- prometheus_text_format
- prometheus_protobuf_format
content_type()` - should return content type of the format;
- `format()` - should format `default regsitry;
- format(Registry)` - should format `Registry.Generated by EDoc