public String toString()
    {
        return new StringBuilder()
                .append('{')
                .append("packageName:").append(packageName)
                .append(',').append("standardOptions:").append(standardOptions)
                .append(',').append("extraOptions:").append(extraOptions)
                .append(',').append("messages:").append(getMessages())
                .append('}')
                .toString();
    }
Returns a Message or EnumGroup given its fully qualified name

@param fullyQualifiedName
           The fully qualified name, without an initial dot ('.')
@return The Message or EnumGroup instance if it is defined in this Proto or one of its imports.
protostuff-parser/src/main/java/io/protostuff/parser/Proto.java