core/src/main/java/org/trimou/handlebars/HelpersBuilder.java
public HelpersBuilder addIf(String elseStartDelimiter, String elseEndDelimiter) {
        builder.put(IF, new IfHelper(elseStartDelimiter, elseEndDelimiter));
        return this;
    }
public HelpersBuilder addIf(String elseStartDelimiter, String elseEndDelimiter) {
        builder.put(IF, new IfHelper(elseStartDelimiter, elseEndDelimiter));
        return this;
    }
Add an instance of {@link IfHelper} with the {@value #IF} name and the given else delimiters.

@return self