Partially copied from https://github.com/microsoft/vscode/blob/f66e839a38dfe39ee66a86619a790f9c2336d698/src/vs/workbench/contrib/codeEditor/browser/saveParticipants.ts#L272
Protected
Readonly
Optional
Partially copied from https://github.com/microsoft/vscode/blob/f66e839a38dfe39ee66a86619a790f9c2336d698/src/vs/workbench/contrib/codeEditor/browser/saveParticipants.ts#L272