Struct PatchField 

pub struct PatchField {
    pub name: &'static str,
    pub clearable: bool,
    pub summary: &'static str,
}

Every field a batch can change, and whether it can be emptied.

clearable is part of the projection rather than a detail of the apply: a remote surface that cannot represent “unset this field” cannot offer --clear, and a capability list that omitted the distinction would advertise a request it has to refuse.

Fields

name: &'static str

The name in PatchFlags, in the CLI’s field order.

clearable: bool

Whether --clear <name> is accepted.

summary: &'static str

One line for a schema description.