Thanks for reporting.

Since the field is optional, MaxObjectSizeLimitInfo is definitely not right as it'll always be included despite the omitempty tag, while *MaxObjectSizeLimitInfo would allow the zero value to be properly omitted.

The documentation for the ConfigInput entity says:

The max object size limit of this project as a MaxObjectSizeLimitInfo entity.
If set to 0, the max object size limit is removed.
If not set, this setting is not updated.

The first and last paragraph suggests that *MaxObjectSizeLimitInfo would be right. However, the "if set to 0" part suggests maybe it can be a string or integer value too? To allow that, I think we'd need to use interface{} and let the user provide the desired type.

It's also possible the documentation is incorrect, though, since the example request shows a string being used:

"max_object_size_limit": "10m",

From the first look, interfae{} looks like the way to go here.
Proper inline documentation would be very useful to have to describe the possible values.

@andygrunwald It should be possible to infer the type from Gerrit's code. If ProjectInput.java is the right place to look, then using string as implemented in PR #112 looks right (and Gerrit REST API documentation needs updating).

I found that the configinfo setting parameter does not take effect， such as State、SubmitType、Actions