Possible null reference argument for parameter 'parentId' in 'Activity Activity.SetParentId(string parentId)'.

'IDocumentStore.OpenSession(DocumentTracking, IsolationLevel)' is obsolete: 'Opening a session without explicitly providing desired type may be dropped in next Marten version.

'IDocumentStore.OpenSession(DocumentTracking, IsolationLevel)' is obsolete: 'Opening a session without explicitly providing desired type may be dropped in next Marten version.

Non-nullable property 'Bron' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

'IDocumentStore.OpenSession(DocumentTracking, IsolationLevel)' is obsolete: 'Opening a session without explicitly providing desired type may be dropped in next Marten version.

Non-nullable field '_allowedTypes' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Possible null reference argument for parameter 'postgreSqlOptions' in 'void ConfigHelpers.ThrowIfInvalidPostgreSqlOptions(PostgreSqlOptionsSection postgreSqlOptions)'.

Possible null reference argument for parameter 'elasticSearchOptions' in 'void ConfigHelpers.ThrowIfInvalidElasticOptions(ElasticSearchOptionsSection elasticSearchOptions)'.

Possible null reference argument for parameter 'postgreSqlOptions' in 'string GetPostgresConnectionString(PostgreSqlOptionsSection postgreSqlOptions)'.

Possible null reference argument for parameter 'uriString' in 'Uri.Uri(string uriString)'.

'IDocumentStore.OpenSession(DocumentTracking, IsolationLevel)' is obsolete: 'Opening a session without explicitly providing desired type may be dropped in next Marten version.

'IDocumentStore.OpenSession(DocumentTracking, IsolationLevel)' is obsolete: 'Opening a session without explicitly providing desired type may be dropped in next Marten version.

'IDocumentStore.OpenSession(DocumentTracking, IsolationLevel)' is obsolete: 'Opening a session without explicitly providing desired type may be dropped in next Marten version.

Non-nullable property 'Bron' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable field '_allowedTypes' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Possible null reference argument for parameter 'parentId' in 'Activity Activity.SetParentId(string parentId)'.

Possible null reference argument for parameter 'postgreSqlOptions' in 'void ConfigurationExtensions.ThrowIfInvalid(PostgreSqlOptionsSection postgreSqlOptions)'.

Dereference of a possibly null reference.

Possible null reference argument for parameter 'uriString' in 'Uri.Uri(string uriString)'.