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: _external_access_details.rs
    path of file: ./repos/aws-sdk-rust/sdk/accessanalyzer/src/types
    
    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.

/// <p>Contains information about an external access finding.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct ExternalAccessDetails {
    /// <p>The action in the analyzed policy statement that an external principal has permission to use.</p>
    pub action: ::std::option::Option<::std::vec::Vec<::std::string::String>>,
    /// <p>The condition in the analyzed policy statement that resulted in an external access finding.</p>
    pub condition: ::
    
    pub fn build(self) -> ::std::result::Result<crate::types::ExternalAccessDetails, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::ExternalAccessDetails {
            action: self.action,
            condition: self.condition.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "condition",
                    "condition was not specified but it is required when building ExternalAccessDetails",
                )
            })?,
            is_public: self.is_public,
            principal: self.principal,
            sources: self.sources,
        })
    }