question: public static CertChain create ( String instanceIdentifier , X509Certificate [ ] chain ) { if ( chain . length < 2 ) { throw new CodedException ( X_CANNOT_CREATE_CERT_PATH , "Chain must have at least user's certificate " + "and root certificate authority" ) ; } X509Certificate trustAnchor = chain [ chain . length - 1 ] ; List < X509Certificate > additionalCerts = new ArrayList < > ( ) ; if ( chain . length > 2 ) { additionalCerts . addAll ( Arrays . asList ( Arrays . copyOfRange ( chain , 1 , chain . length - 1 ) ) ) ; } try { return new CertChain ( instanceIdentifier , chain [ 0 ] , trustAnchor , additionalCerts ) ; } catch ( Exception ex ) { throw translateWithPrefix ( X_CANNOT_CREATE_CERT_PATH , ex ) ; } }
target:  Builds certificate chain form the given array of certificates (ordered with the user's certificate first and the root certificate authority last).