function FieldReference(properties) {
                        if (properties)
                            for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                if (properties[keys[i]] != null)
                                    this[keys[i]] = properties[keys[i]];
                    }
function FieldReference(properties) {
                        if (properties)
                            for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                if (properties[keys[i]] != null)
                                    this[keys[i]] = properties[keys[i]];
                    }
function FieldReference ( properties ) { if ( properties ) for ( var keys = Object . keys ( properties ) , i = 0 ; i < keys . length ; ++ i ) if ( properties [ keys [ i ] ] != null ) this [ keys [ i ] ] = properties [ keys [ i ] ] ; }
Properties of a FieldReference.
@memberof google.firestore.v1.StructuredQuery
@interface IFieldReference
@property {string|null} [fieldPath] FieldReference fieldPath
 
Constructs a new FieldReference.
@memberof google.firestore.v1.StructuredQuery
@classdesc Represents a FieldReference.
@implements IFieldReference
@constructor
@param {google.firestore.v1.StructuredQuery.IFieldReference=} [properties] Properties to set
Properties of a FieldReference .