nl_tokens: Compiles the provided field path to a function that retrieves the value of the field denoted by the field path from the object passed to the function or { @code undefined } if the field does not exist in the object .
pl_tokens: function compileFieldGetter ( fieldPath ) { let fields = fieldPath . split ( "." ) return ( record ) => { let value = record for ( let field of fields ) { if ( ! ( value instanceof Object ) || ! value . hasOwnProperty ( field ) ) { return undefined } value = <mask> [ field ] } return value } }