get_property_key

Description:

public static unowned string get_property_key (string operation_type, string property_name, string property_key_name)

operation_type	the name of the operation type we want to query to property keys for.
property_name	the property to query a key for.
property_key_name	the property mata data key to query

NULL or a string with the meta-data value for the operation key.