FieldMapping interface 
A single field mapping of the mapped entity
Properties
| column | 
	the column name to be mapped to the identifier  | 
| identifier | the V3 identifier of the entity  | 
Property Details
		columnName
	 
	the column name to be mapped to the identifier
columnName?: string
				Property Value
string
identifier
the V3 identifier of the entity
identifier?: string
				Property Value
string