This builder either takes a hash and queries for the object or an array of documents, where it will just return them.
@example Build the documents.
Builder.new(meta, attrs).build
@param [ String ] type The type of document to query for.
@return [ Array<Document> ] The documents.
Do we need to perform a database query? It will be so if the object we have is not a document.
@example Should we query the database?
builder.query?
@return [ true, false ] Whether a database query should happen.
@since 2.0.0.rc.1
[Validate]