code: public Criteria contains(String s) {
  		assertNoBlankInWildcardedQuery(s, true, true);
  		predicates.add(new Predicate(OperationKey.CONTAINS, s));
  		return this;
  
  	}
docs: Crates new {@link Predicate} with leading and trailing wildcards <br/>
  <strong>NOTE: </strong>mind your schema as leading wildcards may not be supported and/or execution might be slow.
  <strong>NOTE: </strong>Strings will not be automatically split on whitespace.
  
  @param s
  @return
  @throws InvalidDataAccessApiUsageException for strings with whitespace