/**
* Returns the boolean value if the concept of this obs is of boolean datatype
*
* @return true or false if value is set otherwise null
* @should return true if value coded answer concept is true concept
* @should return false if value coded answer concept is false concept
*/
public Boolean getValueBoolean() {
if (getConcept() != null && valueCoded != null && getConcept().getDatatype().isBoolean())
return valueCoded.equals(Context.getConceptService().getTrueConcept());
return null;
}
