Return a map of shared parameter definition groups contained within the file.
Assembly: RevitAPI (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0)
A particular group can be found by Name, using the Item property on the DefinitionGroups object. A new group can be created by using the Create method on the DefinitionGroups Object. The Create method takes the name of the new group, as a string, as its input parameter, returning a reference to a new definition group object as its result.