anchor.diff:  This advanced setting controls how many documents on a particular shard have
   to contain a pair of terms before the connection is returned for global
   consideration. Defaults to 2.
  +======
   
   connections::
   Specifies or more fields from which you want to extract terms that are
  
positive.code: 
  The default settings are configured to remove noisy data and
  get the "big picture" from your data. This example shows how to specify
  additional parameters to influence how the graph is built. 
  
  For tips on tuning the settings for more detailed forensic evaluation where
  every document could be of interest, see the
  
negative.code: <1> The vertices you want to start from are specified
  as an array of terms in an `include` clause.
  <2> The `exclude` clause prevents terms you already know about from being
  included in the results.
  