DelegatingFilterProxy usage with filters bean id

web.xml

    springSecurityFilterChain
    org.springframework.web.filter.DelegatingFilterProxy
  
  
    samlFilter
    org.springframework.web.filter.DelegatingFilterProxy
  
  
    springSecurityFilterChain
    /admin/*
  
  
    samlFilter
    /saml/*
    ERROR
    REQUEST
    INCLUDE
    FORWARD
  

There is samlFilter in saml.xml

        <security:filter-chain-map request-matcher="ant">
            <security:filter-chain pattern="/saml/login/**" filters="samlEntryPoint"/>
            <security:filter-chain pattern="/saml/logout/**" filters="samlLogoutFilter"/>
            <security:filter-chain pattern="/saml/SSO/**" filters="samlWebSSOProcessingFilter"/>
            <security:filter-chain pattern="/saml/SSOHoK/**" filters="samlWebSSOHoKProcessingFilter"/>
            <security:filter-chain pattern="/saml/SingleLogout/**" filters="samlLogoutProcessingFilter"/>
            <security:filter-chain pattern="/saml/discovery/**" filters="samlIDPDiscovery"/>
        </security:filter-chain-map>