Retrieves a population by ID
     
    
    getPopulation(experimentId, populationId, params = list())
 
    
    Arguments
- experimentId
- ID of experiment. 
- populationId
- ID of the population. 
- params
- Optional query parameters. 
 
    
    Examples
    if (FALSE) { # \dontrun{
# Retrieve by ID
getPopulation(experimentId, populationId)
# Lookup by name
getPopulation(experimentId, byName("Singlets"))
} # }