Custom Python ODB backends - write() support

Is there any support for implementing write() for custom python ODB backends?

I noticed it wasn't in the docs, but tried implementing it like so:

class MyOdbBackend(pygit2.OdbBackend):

    # snip - other OdbBackend methods

   def write(self, oid, data, length, type):
        print(f"writing {oid} {length} type {type}")
        return True

repo = pygit2.Repository()
odb = pygit2.Odb()
odb.add_backend(MyOdbBackend(), 1)
repo.set_odb(odb)

test_blob_id = repo.create_blob(b"hello world\n")
print(repo[test_blob_id].data)

But I get a _pygit2.GitError: TLS backend doesn't support certificate locations on calling repo.create_blob(). The built-in backends seem to work fine.

首先复现自定义 MyOdbBackend.write() 示例以及 repo.create_blob() 处的失败。阅读 OdbBackend 和 add_backend 接口及相关文档，以确定是否支持 write()。完成的标准是：要么实现该行为并使用此示例进行验证，要么明确记录该限制及错误原因。