public DeclarableType getGatewayEventSubstitutionFilter() {
      return gatewayEventSubstitutionFilter;
    }
Gets the value of the gatewayEventSubstitutionFilter property.

possible object is
{@link DeclarableType }

@return the {@link GatewayEventSubstitutionFilter} type.
geode-core/src/main/java/org/apache/geode/cache/configuration/CacheConfig.java