OptionalnameMap a MathJSON function or symbol name to this entry.
Each entry should have at least a name or a parse handler.
An entry with no name cannot be serialized: the name is used to map
a MathJSON function or symbol name to the appropriate entry for serializing.
However, an entry with no name can be used to define a synonym (for example
for the symbol \varnothing which is a synonym for \emptyset).
If no parse handler is provided, only the trigger is used to select this
entry. Otherwise, if the trigger of the entry matches the current
token, the parse handler is invoked.
OptionalserializeTransform an expression into a LaTeX string.
If no serialize handler is provided, the trigger property is used
Maps a string of LaTeX tokens to a function or symbol and vice-versa.