code: function serializeStatements (statements) {
    var source = statements.map(function (st) { return st.toNT() })
    source = source.join('\n')
    return source
  }
docs: Serializes an array of RDF statements into a simple N-Triples format
  suitable for writing to a solid server.
  @method serializeStatements
  
  @param statements {Array<Statement>} List of RDF statements
  
  @return {string}