getBodies

        pub fn getBodies(declaration: Declaration, extra_end: u32, zir: Zir) Bodies {
            var extra_index: u32 = extra_end;
            const value_body_len = declaration.value_body_len;
            const type_body_len: u32 = len: {
                if (!declaration.flags().kind.hasTypeBody()) break :len 0;
                const len = zir.extra[extra_index];
                extra_index += 1;
                break :len len;
            };
            const align_body_len, const linksection_body_len, const addrspace_body_len = lens: {
                if (!declaration.flags.kind.hasSpecialBodies()) {
                    break :lens .{ 0, 0, 0 };
                }
                const lens = zir.extra[extra_index..][0..3].*;
                extra_index += 3;
                break :lens lens;
            };
            return .{
                .type_body = if (type_body_len == 0) null else b: {
                    const b = zir.bodySlice(extra_index, type_body_len);
                    extra_index += type_body_len;
                    break :b b;
                },
                .align_body = if (align_body_len == 0) null else b: {
                    const b = zir.bodySlice(extra_index, align_body_len);
                    extra_index += align_body_len;
                    break :b b;
                },
                .linksection_body = if (linksection_body_len == 0) null else b: {
                    const b = zir.bodySlice(extra_index, linksection_body_len);
                    extra_index += linksection_body_len;
                    break :b b;
                },
                .addrspace_body = if (addrspace_body_len == 0) null else b: {
                    const b = zir.bodySlice(extra_index, addrspace_body_len);
                    extra_index += addrspace_body_len;
                    break :b b;
                },
                .value_body = if (value_body_len == 0) null else b: {
                    const b = zir.bodySlice(extra_index, value_body_len);
                    extra_index += value_body_len;
                    break :b b;
                },
            };
        }