Connect to 'Elasticsearch', a 'NoSQL' database built on the 'Java' Virtual Machine. Interacts with the 'Elasticsearch' 'HTTP' API (<https://www.elastic.co/elasticsearch/>), including functions for setting connection details to 'Elasticsearch' instances, loading bulk data, searching for documents with both 'HTTP' query variables and 'JSON' based body requests. In addition, 'elastic' provides functions for interacting with API's for 'indices', documents, nodes, clusters, an interface to the cat API, and more.