Method emit

deps/v8/test/mjsunit/wasm/wasm-module-builder.js:1979–1980

                (is_memory64 ? 4 : 0) | (is_shared ? 2 : 0) | (has_max ? 1 : 0);
            section.emit_u8(limits_byte);
            let emit = val =>
                is_memory64 ? section.emit_u64v(val) : section.emit_u32v(val);
            emit(imp.initial);
            if (has_max) emit(imp.maximum);
          } else if (imp.kind == kExternalTable) {