[ARROW-1985] [JS] Schema custom_metadata is not exposed

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: JS-0.3.0
• Component/s: JavaScript
• External issue URL: https://github.com/apache/arrow/issues/15644
• Assignee: Brian Hulette
• Reporter: Brian Hulette
• Created: 10/Jan/18 22:10
• Updated: 11/Jan/23 07:18
• Resolved: 02/Feb/18 02:00

Description

We extract the Schema's `custom_metadata` from the flatbuffers and put it into a `Schema` object (https://github.com/apache/arrow/blob/master/js/src/format/fb.ts#L80), but that object isn't kept around.