The input dataset must yield batched rank-1 tensors. This function reads
each coordinate of the tensor as an individual element and caps the total
number of elements to return. Note either none of the elements in one batch is
added to the returned result, or all the elements are added. This means the
length of the returned list of elements could be less than
max_user_contribution when dataset is capped.
The maximum length (in bytes) of strings in the dataset.
Strings longer than max_string_length will be truncated. Defaults to
None, which means there is no limit of the string length.
A rank-1 Tensor containing the unique elements of the input
dataset after being capped. If the total number of elements is less than or
equal to max_user_contribution, returns all the elements in dataset.
A rank-1 Tensor containing the counts for each of the elements in
-- If the shape of elements in dataset is not rank 1.
-- If max_user_contribution is less than 1.
-- If batch_size is less than 1.
-- If max_string_length is not None and is less than 1.