studies_find_studies and
studies_find_trees.list_trees returns all trees associated with a particular
study when used on an object returned by
studies_find_studies, but only the trees that match
the search criteria when used on objects returned by
studies_find_trees.list_trees(matched_studies, ...)## S3 method for class 'matched_studies':
list_trees(matched_studies, study_id, ...)
studies_find_trees or studies_find_studies.study_id listed in the object returned by
studies_find_treeslist_trees returns a list of the tree_ids for each
study that match the requested criteria. If a study_id
is provided, then only the trees for this study are returned
as a vector.studies_find_studies and
studies_find_trees. The help for these functions
have examples demonstrating the use of list_trees.