The height of the btree. An empty tree will have height 0.

return whether the iterator is at end

! @brief return whether value is an unsigned integer number This function returns true if and only if the JSON value is an unsigned integ

Span::last() Returns a `Span` containing last `len` elements. Parameter `len` is of type `size_type` and thus non-negative. `len` value must be <= si

! @brief determine system byte order @return true if and only if system's byte order is little endian @note from https://stackoverflow.com/a/1001328

max_size(const Alloc& a): Returns a.max_size() if possible. If not possible, returns std::numeric_limits<size_type>::max() / sizeof(value_type)

! @brief post-increment (it++) @pre The iterator is initialized; i.e. `m_object != nullptr`. */

! @brief post-decrement (it--) @pre The iterator is initialized; i.e. `m_object != nullptr`. */

PRECONDITION: not an end() iterator.

optional::reset() Destroys the inner `T` value of an `phmap::optional` if one is present.

this is really only appropriate for saving fake-loaded resources right now; don't use it to save anything else*/

select_on_container_copy_construction(const Alloc& a): Returns a.select_on_container_copy_construction() if possible. If not possible, returns a.

Helper function to sort a vector of strings for consistent comparison

returns 1 if the sum of two signed ints is valid (between -2^31 and 2^31-1 inclusive), 0 on overflow.

create the png data from post-deflated data

this function is designed to support animated gifs, although stb_image doesn't support it two back is the image from two frames ago, used for a very s