lookup_param
  
  Description:
  public unowned Param? 
lookup_param (
string name)
  
 
  
    Get the value of the parameter called name.
    Parameters:
    
      
        | this | The ProxyCall | 
      
        | name | The paramter name | 
    
    Returns:
    
      
        | The parameter value, or null if it does not exist. This string is owned by the 
            ProxyCall and should not be freed. |