SwiftLint/Source/SwiftLintBuiltInRules/Rules/RuleConfigurations/UnusedDeclarationConfiguration.swift

import SwiftLintCore

@AutoConfigParser
struct UnusedDeclarationConfiguration: SeverityBasedRuleConfiguration {
    @ConfigurationElement(key: "severity")
    private(set) var severityConfiguration = SeverityConfiguration<Parent>.error
    @ConfigurationElement(key: "include_public_and_open")
    private(set) var includePublicAndOpen = false
    @ConfigurationElement(
        key: "related_usrs_to_skip",
        postprocessor: { $0.insert("s:7SwiftUI15PreviewProviderP") }
    )
    private(set) var relatedUSRsToSkip = Set<String>()
}