title: Cannot store variable values at RobotFramework
body: <p>For example, we have:</p>
  
  <pre><code>Get ticket value
          Wait Until Element is Visible    ${ticketDescription}
          ${ticketDescValue}=    Execute Javascript    return window.document.querySelector('p[class*="ticket-description"]').innerHTML.toString()
  
  
  Verify if ticket value matches
         Element Text Should Be    ${some_locator}    ${ticketDescValue}
  </code></pre>
  
  <p>where, ${ticketDescValue} would be an expected text</p>
  
  <p>Test Cases example:</p>
  
  <pre><code>*** Test Cases ***
  Ticket value is correct
      [Documentation]    OK: test test test
      [Tags]    Add to basket
      Go to some URL
      Get ticket value
      Navigate to product details page
      Verify if ticket value matches
  </code></pre>
  
  <p>Is there some way to share variables between existing keywords?
  In Java I can use getters and setters for this case.
  Or send parameters to method, etc...</p>
  
  <p>How to implement it using Robot Framework?</p>