`formulas()`

creates a list of two-sided formulas by merging a
unique left-hand side to a list of right-hand sides.

## Arguments

- .response
A one-sided formula used as the left-hand side of all resulting formulas.

- ...
List of formulas whose right-hand sides will be merged to

`.response`

.

## Examples

```
# Provide named arguments to create a named list of formulas:
models <- formulas(~lhs,
additive = ~var1 + var2,
interaction = ~var1 * var2
)
models$additive
#> lhs ~ var1 + var2
#> <environment: 0x5651b5eec658>
# The formulas are created sequentially, so that you can refer to
# previously created formulas:
formulas(~lhs,
linear = ~var1 + var2,
hierarchical = add_predictors(linear, ~(1 | group))
)
#> $linear
#> lhs ~ var1 + var2
#> <environment: 0x5651b5eec658>
#>
#> $hierarchical
#> lhs ~ var1 + var2 + (1 | group)
#> <environment: 0x5651b5eec658>
#>
```