CompositeType

        pub const CompositeType = struct {
            pub const ops = [_]AbbrevOp{
                .{ .literal = @backingInt(ModuleBlock.MetadataBlock.Code.COMPOSITE_TYPE) },
                .{ .literal = 0 | 0x2 }, // is distinct | is not used in old type ref
                .{ .fixed = 32 }, // tag
                MetadataAbbrev, // name
                MetadataAbbrev, // file
                LineAbbrev, // line
                MetadataAbbrev, // scope
                MetadataAbbrev, // underlying type
                .{ .vbr = 6 }, // size in bits
                .{ .vbr = 6 }, // align in bits
                .{ .literal = 0 }, // offset in bits
                .{ .fixed = 32 }, // flags
                MetadataAbbrev, // elements
                .{ .literal = 0 }, // runtime lang
                .{ .literal = 0 }, // vtable holder
                .{ .literal = 0 }, // template params
                .{ .literal = 0 }, // raw id
                .{ .literal = 0 }, // discriminator
                .{ .literal = 0 }, // data location
                .{ .literal = 0 }, // associated
                .{ .literal = 0 }, // allocated
                .{ .literal = 0 }, // rank
                .{ .literal = 0 }, // annotations
            };

            tag: u32,
            name: Builder.Metadata.String.Optional,
            file: Builder.Metadata.Optional,
            line: u32,
            scope: Builder.Metadata.Optional,
            underlying_type: Builder.Metadata.Optional,
            size_in_bits: u64,
            align_in_bits: u64,
            flags: Builder.Metadata.DIFlags,
            elements: Builder.Metadata.Optional,
        }