code: function constructCode(code, system, display) {
    const codeObj = new models.Concept(system, code, display);
    return codeObj;
  }
docs: Concept from components
  
  Constructs a Concept object from component details.
  
  @param {string} code - the code component of a Concept Code
  @param {uri} system - the code system component of a Concept Code
  @param {string} display - descriptive display text to show alongside the Concept Code
  @returns {Concept} A Concept object that matches the input components.