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context_title: "$Context.title",
com_instructure_post_message_token: "$com.instructure.PostMessageToken",
com_instructure_assignment_lti_id: "$com.instructure.Assignment.lti.id",
com_instructure_originality_report_id: "$com.instructure.OriginalityReport.id",
com_instructure_submission_id: "$com.instructure.Submission.id",
com_instructure_file_id: "$com.instructure.File.id",
course_offering_sourced_id: "$CourseOffering.sourcedId",
context_id: "$Context.id",
context_sourced_id: "$Context.sourcedId",
message_document_target: "$Message.documentTarget",