Ability to handle google sheet discrepancies.

[vutukuriajay2241]

If the sheet has invalid data. The visualization should not render and be able to throw an error.

[emquardokus]

You should define what "invalid data" means here so we can try to encourage authors of tables to provide information. Keep in mind that empty label or id columns is currently possible because not all cell types, or anatomical structures are represented in these ontologies. On-going work we are doing is to report these to the respective ontology curators after double checking against ontologies for synonyms, some synonyms also do not exist.