code: public TemplateGenerator addFieldGenerator(String fieldName, FieldGenerator fieldGenerator) {
  		multiFieldGenerator.addFieldGenerator(fieldName, fieldGenerator);
  		return this;
  	}
docs: Adds a {@link net.cpollet.jixture.fixtures.generator.field.FieldGenerator}.
  
  @param fieldName the field's name whom value is to be overridden.
  @param fieldGenerator the field generator to add
  @return the current instance.