code: static ContentCryptoMaterial fromInstructionFile(
          Map<String, String> instFile,
          EncryptionMaterialsAccessor kekMaterialAccessor,
          Provider securityProvider,
          boolean alwaysUseSecurityProvider,
          long[] range,
          ExtraMaterialsDescription extra,
          boolean keyWrapExpected,
          AWSKMS kms) {
          return fromInstructionFile0(instFile, kekMaterialAccessor,
                                      securityProvider, alwaysUseSecurityProvider, range, extra,
                                      keyWrapExpected, kms);
      }
docs: Factory method to return the content crypto material from the S3
  instruction file, using the specified key encrypting key material
  accessor and an optional security provider.
  
  @return a non-null content crypto material.