docs: private CompilerType getDefaultCompiler() {
          try {
              final String prop = this.conf.getChainedProperties().getProperty( JAVA_COMPILER_PROPERTY,
                                                                                "ECLIPSE" );
              if ( prop.equals( "NATIVE" ) ) {
                  return CompilerType.NATIVE;
              } else if ( prop.equals( "ECLIPSE" ) ) {
                  return CompilerType.ECLIPSE;
              } else if ( prop.equals( "JANINO" ) ) {
                  return CompilerType.JANINO;
              } else {
                  logger.error( "Drools config: unable to use the drools.compiler property. Using default. It was set to:" + prop );
                  return CompilerType.ECLIPSE;
              }
          } catch ( final SecurityException e ) {
              logger.error( "Drools config: unable to read the drools.compiler property. Using default.", e);
              return CompilerType.ECLIPSE;
          }
      }