dynagroup.js

var groupDefinition = new GroupDefinition();

groupDefinition.name = 'Servers by plugins';
groupDefinition.description = 'Group servers by plugin';
groupDefinition.expression =  'resource.type.category=SERVER\n'
                             +'groupby resource.type.plugin';
groupDefinition.recalculationInterval = 60000;

// Returns the new group definition that is ready to be used on other
// calls or throws an exception
groupDefinition = GroupDefinitionManager.createGroupDefinition(groupDefinition);

// Forces refresh of the members
GroupDefinitionManager.calculateGroupMembership(groupDefinition.id);

// Update the groupDefinition
groupDefinition.name = 'Servers by plugins UPDATED';
groupDefinition = GroupDefinitionManager.updateGroupDefinition(groupDefinition);

// Forces refresh
GroupDefinitionManager.calculateGroupMembership(groupDefinition.id);