This example demonstrates how to extend the client, in order to call custom APIs, for example added by a plugin.
The main.go example defines a custom type, which embeds the regular Elasticsearch client, and adds a Custom namespace with an Example() method.
To run the example:
go run main.go
# GET http://localhost:9209/_cat/health 200 OK 25ms
# « 1555252476 14:34:36 go-elasticsearch green 1 1 0 0 0 0 0 0 - 100.0%
#
# GET http://localhost:9209/_cat/example 200 OK 0s
# « Hello from Cat Example action