anchor.diff:  assertThat(link.getRel(), is("foo"));
   assertThat(link.getHref(), is("/foo/bar"));
   ----
  -
  
positive.code: 
  [source,java,indent=0]
  ----
  include::{baseDir}/src/test/java/org/springframework/hateoas/client/TraversonTests.java[tag=hop-put]
  ----
  
  It's also possible to load an entire `Map` of parameters via `.withParameters(Map)`.
  
negative.code: 
  [source,java,indent=0]
  ----
  include::{baseDir}/src/test/java/org/springframework/hateoas/client/TraversonTest.java[tag=hop-with-param]
  ----
  
  The static `rel(...)` function is a convenient way to define a single `Hop`. Using `.withParameter(key, value)` makes it simple to specify URI Template variables.
  