The given value will be put at the entry named by key into the table
provided in thandle.
Alternatively you can also put the value by position into the table by
providing the pos argument.
If both, pos and key are provided, the key will be used.
Though, both of them are optional, at least one of them has to be provided.
Nodes of different colours represent the following:
Solid arrows point from a procedure to one which it calls. Dashed
arrows point from an interface to procedures which implement that interface.
This could include the module procedures in a generic interface or the
implementation in a submodule of an interface in a parent module.