Optional. Parent (data type) for the Data Point collection Format: users/me/dataTypes/{data_type}, e.g.: - users/me/dataTypes/steps - users/me/dataTypes/- For a list of the supported data types see the DataPoint data union field. Deleting data points across multiple data type collections is supported following https://aip.dev/159. If this is set, the parent of all of the data points specified in names must match this field.