opaqueType

pub fn opaqueType(self: *Builder, name: String) Allocator.Error!Type {
    try self.string_map.ensureUnusedCapacity(self.gpa, 1);
    if (name.slice(self)) |id| {
        const count: usize = comptime std.fmt.count("{d}", .{std.math.maxInt(u32)});
        try self.string_bytes.ensureUnusedCapacity(self.gpa, id.len + count);
    }
    try self.string_indices.ensureUnusedCapacity(self.gpa, 1);
    try self.types.ensureUnusedCapacity(self.gpa, 1);
    try self.next_unique_type_id.ensureUnusedCapacity(self.gpa, 1);
    try self.ensureUnusedTypeCapacity(1, Type.NamedStructure, 0);
    return self.opaqueTypeAssumeCapacity(name);
}