Turn lavaan model into its data frame version.

Chain this function onto check_object. Use this function first before using check_lavaan_uses.

check_lavaan_df(state, invalid_model_msg = NULL, append = TRUE)

Arguments

state	state to start from (should be state produced by `check_object`).
invalid_model_msg	if specified, this overrides the automatically generated feedback message in case the targeted variable does not validly represent a lavaan model.
append	whether or not to append the invalid model message to earlier messages that describe the object.

# NOT RUN {
# example
model <- 'a ~ x1'

# sct
ex() %>%
  check_object("model") %>%
  check_lavaan_df()
# }