@Override
    public String toString() {
        return "FunctionSignature{" +
                "name='" + name + '\'' +
                ", aliases=" + aliases +
                ", categoryPath=" + categoryPath +
                ", args=" + args +
                ", returnType=" + returnType +
                ", returnDescription='" + returnDescription + '\'' +
                ", description='" + description + '\'' +
                ", overloadType='" + overloadType + '\'' +
                '}';
    }
@return True if this function signature is overloaded within its category
stroom-core-shared/src/main/java/stroom/query/shared/QueryHelpFunctionSignature.java