Commands: Documents: How to get document metadata only?

Head is used to retrieve document metadata from a database.

Syntax

{CODE:java head_1@ClientApi\Commands\Documents\HowTo\Head.java /}

Parameters
key	String	key of a document to get metadata for

Return Value
JsonDocumentMetadata	Metadata information for document with given key.

{CODE:java head_2@ClientApi\Commands\Documents\HowTo\Head.java /}