String function ( String arg0 ) { if ( lhs . isFieldName ( ) && lhs . asFieldName ( ) . equals ( arg0 ) && rhs . isFieldName ( ) ) return rhs . asFieldName ( ) ; else if ( rhs . isFieldName ( ) && rhs . asFieldName ( ) . equals ( arg0 ) && lhs . isFieldName ( ) ) return lhs . asFieldName ( ) ; else return null ; }
determines if this term is of the form `` f1 = f2 '' where f1 is the specified field and f2 is another field . if so , the method returns the name of that field . if not , the method returns null . concode_field_sep Expression lhs concode_elem_sep Expression rhs concode_field_sep Constant equatesWithConstant concode_elem_sep int reductionFactor concode_elem_sep boolean appliesTo concode_elem_sep boolean isSatisfied concode_elem_sep String toString