You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: _list_actions_output.rs
    path of file: ./repos/aws-sdk-rust/sdk/iotsitewise/src/operation/list_actions
    
    the code of the file until where you have to start completion: // Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
#[allow(missing_docs)] // documentation missing in model
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct ListActionsOutput {
    /// <p>A list that summarizes the actions associated with the specified asset.</p>
    pub action_summaries: ::std::vec::Vec<crate::types::ActionSummary>,
    ///
    
    pub fn build(self) -> ::std::result::Result<crate::operation::list_actions::ListActionsOutput, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::operation::list_actions::ListActionsOutput {
            action_summaries: self.action_summaries.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "action_summaries",
                    "action_summaries was not specified but it is required when building ListActionsOutput",
                )
            })?,
            next_token: self.next_token.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "next_token",
                    "next_token was not specified but it is required when building ListActionsOutput",
                )
            })?,
            _request_id: self._request_id,
        })
    }