| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 66 of 160 | 58% | 12 of 18 | 33% | 10 | 16 | 15 | 32 | 2 | 7 |
| customSignature() | | 56% | | 25% | 4 | 5 | 10 | 19 | 0 | 1 |
| withChildren(List) | | 0% | | 0% | 2 | 2 | 2 | 2 | 1 | 1 |
| lambda$customSignature$0(Expression) | | 45% | | 25% | 2 | 3 | 0 | 1 | 0 | 1 |
| Coalesce(ScalarFunctionParams) | | 0% | n/a | 1 | 1 | 2 | 2 | 1 | 1 | |
| nullable() | | 89% | | 75% | 1 | 3 | 1 | 5 | 0 | 1 |
| Coalesce(Expression, Expression[]) | | 100% | n/a | 0 | 1 | 0 | 2 | 0 | 1 | |
| accept(ExpressionVisitor, Object) | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 |