pub fn ser_describe_regions_input_input(
object: &mut ::aws_smithy_json::serialize::JsonObjectWriter,
input: &crate::operation::describe_regions::DescribeRegionsInput,
) -> Result<(), ::aws_smithy_types::error::operation::SerializationError> {
if let Some(var_1) = &input.directory_id {
object.key("DirectoryId").string(var_1.as_str());
}
if let Some(var_2) = &input.region_name {
object.key("RegionName").string(var_2.as_str());
}
if let Some(var_3) = &input.next_token {
object.key("NextToken").string(var_3.as_str());
}
Ok(())
}