pub fn ser_describe_cache_engine_versions_input_input_input(
input: &crate::operation::describe_cache_engine_versions::DescribeCacheEngineVersionsInput,
) -> ::std::result::Result<::aws_smithy_types::body::SdkBody, ::aws_smithy_types::error::operation::SerializationError> {
let mut out = String::new();
#[allow(unused_mut)]
let mut writer = ::aws_smithy_query::QueryWriter::new(&mut out, "DescribeCacheEngineVersions", "2015-02-02");
#[allow(unused_mut)]
let mut scope_1 = writer.prefix("Engine");
if let Some(var_2) = &input.engine {
scope_1.string(var_2);
}
#[allow(unused_mut)]
let mut scope_3 = writer.prefix("EngineVersion");
if let Some(var_4) = &input.engine_version {
scope_3.string(var_4);
}
#[allow(unused_mut)]
let mut scope_5 = writer.prefix("CacheParameterGroupFamily");
if let Some(var_6) = &input.cache_parameter_group_family {
scope_5.string(var_6);
}
#[allow(unused_mut)]
let mut scope_7 = writer.prefix("MaxRecords");
if let Some(var_8) = &input.max_records {
scope_7.number(
#[allow(clippy::useless_conversion)]
::aws_smithy_types::Number::NegInt((*var_8).into()),
);
}
#[allow(unused_mut)]
let mut scope_9 = writer.prefix("Marker");
if let Some(var_10) = &input.marker {
scope_9.string(var_10);
}
#[allow(unused_mut)]
let mut scope_11 = writer.prefix("DefaultOnly");
if let Some(var_12) = &input.default_only {
scope_11.boolean(*var_12);
}
writer.finish();
Ok(::aws_smithy_types::body::SdkBody::from(out))
}