## S3 method for class 'tidy_dagitty'
select(.data, ...)

## S3 method for class 'tidy_dagitty'
filter(.data, ...)

## S3 method for class 'tidy_dagitty'
mutate(.data, ...)

## S3 method for class 'tidy_dagitty'
summarise(.data, ...)

## S3 method for class 'tidy_dagitty'
distinct(.data, ..., .keep_all = FALSE)

## S3 method for class 'tidy_dagitty'
arrange(.data, ...)

## S3 method for class 'tidy_dagitty'
group_by(.data, ...)

## S3 method for class 'tidy_dagitty'
ungroup(.data, ...)

## S3 method for class 'tidy_dagitty'
transmute(.data, ...)

## S3 method for class 'tidy_dagitty'
distinct(.data, ..., .keep_all = FALSE)

## S3 method for class 'tidy_dagitty'
full_join(x, y, by = NULL, copy = FALSE, suffix = c(".x", ".y"), ...)

## S3 method for class 'tidy_dagitty'
inner_join(x, y, by = NULL, copy = FALSE, suffix = c(".x", ".y"), ...)

## S3 method for class 'tidy_dagitty'
left_join(x, y, by = NULL, copy = FALSE, suffix = c(".x", ".y"), ...)

## S3 method for class 'tidy_dagitty'
right_join(x, y, by = NULL, copy = FALSE, suffix = c(".x", ".y"), ...)

## S3 method for class 'tidy_dagitty'
anti_join(x, y, by = NULL, copy = FALSE, ...)

## S3 method for class 'tidy_dagitty'
semi_join(x, y, by = NULL, copy = FALSE, ...)

## S3 method for class 'tidy_dagitty'
slice(.data, ..., .dots = list())

## S3 method for class 'tidy_dagitty'
select_(.data, ..., .dots = list())

## S3 method for class 'tidy_dagitty'
filter_(.data, ..., .dots = list())

## S3 method for class 'tidy_dagitty'
mutate_(.data, ..., .dots = list())

## S3 method for class 'tidy_dagitty'
summarise_(.data, ..., .dots = list())

## S3 method for class 'tidy_dagitty'
arrange_(.data, ..., .dots = list())

## S3 method for class 'tidy_dagitty'
slice_(.data, ..., .dots = list())

library(dplyr)
tidy_dagitty(m_bias()) %>%
  group_by(name) %>%
  summarize(n = n())