Connect to 'Elasticsearch' and 'OpenSearch', 'NoSQL' databases built on the 'Java' Virtual Machine and using the 'Apache' 'Lucene' library. Interacts with the 'Elasticsearch' 'HTTP' API' (< https://www.elastic.co/elasticsearch/>) and the 'OpenSearch' 'HTTP' 'API' (< https://opensearch.org/>). Includes functions for setting connection details to 'Elasticsearch' and 'OpenSearch' 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 APIs for 'indices', documents, nodes, clusters, an interface to the cat API, and more.