src/main/java/org/imsglobal/lti/BasicLTIUtil.java
public static void setProperty(Properties props, String key, String value) {
        if (value == null) {
            return;
        }
        if (value.trim().length() < 1) {
            return;
        }
        props.setProperty(key, value);
    }
public static void setProperty(Properties props, String key, String value) {
        if (value == null) {
            return;
        }
        if (value.trim().length() < 1) {
            return;
        }
        props.setProperty(key, value);
    }
Mutates the passed Properties props variable. Puts the key,value into the
Map if the value is not null and is not empty.

@deprecated See: {@link #setProperty(Map, String, String)}
@param props Variable is mutated by this method.
@param key
@param value