public MustacheEngineBuilder setProperty(String key, Object value) {
        checkArgumentsNotNull(key, value);
        checkNotBuilt();
        this.properties.put(key, value);
        return this;
    }
public MustacheEngineBuilder setProperty(String key, Object value) {
        checkArgumentsNotNull(key, value);
        checkNotBuilt();
        this.properties.put(key, value);
        return this;
    }
public MustacheEngineBuilder setProperty ( String key , Object value ) { checkArgumentsNotNull ( key , value ) ; checkNotBuilt ( ) ; this . properties . put ( key , value ) ; return this ; }
Sets a configuration property.

@param key
@param value
@return self
Sets a configuration property .