def has_version(self, state):
"""Test for existing versions in given state"""
wf_versions = IWorkflowVersions(self.parent)
return wf_versions.has_version(state)
def can_create_new_version(wf, context): # pylint: disable=invalid-name,unused-argument
"""Check if we can create a new version"""
# can't create new version when previous draft already exists
versions = IWorkflowVersions(context)
return not versions.has_version(DRAFT_STATE)