blueflood-core/src/main/java/com/rackspacecloud/blueflood/inputs/processors/TokenDiscoveryWriter.java
static Set<Token> getUniqueTokens(final List<Locator> locators) {

        return Token.getUniqueTokens(locators.stream())
                    .filter(token -> !TokenCache.getInstance().isTokenCurrent(token))
                    .collect(toSet());
    }
static Set<Token> getUniqueTokens(final List<Locator> locators) {

        return Token.getUniqueTokens(locators.stream())
                    .filter(token -> !TokenCache.getInstance().isTokenCurrent(token))
                    .collect(toSet());
    }
For all of these {@link Locator}'s, get a unique list of {@link Token}'s which are not in token cache

@param locators
@return