code: private function parseEnvironmentLine($environmentLine)
      {
          $variables     = array();@
          $variableLines = explode(' ', $environmentLine ?: '');
  
          foreach ($variableLines as $variableLine) {
              if (!empty($variableLine)) {
                  list($key, $value) = $this->parseEnvironementVariable($variableLine);
                  $variables[$key]   = $value;
              }
          }
  
          return $variables;
      }
docs: Parse an environnement line from Travis to return an array of variables
  
  Transform:
  "A=B C=D"
  Into:
  array('a' => 'b', 'c' => 'd')
  
  @param $environmentLine
  @return array