DICTIONARY methods

Table 1. Object methods
Name	Description
`clear( )`	Removes all elements of the dictionary.
`contains( key STRING ) RETURNS BOOLEAN`	Checks if an element with the given key exists in the dictionary.
`copyTo( dst dictionary-type )`	Copies all elements of the dictionary into another dictionary.
`getKeys( ) RETURNS DYNAMIC ARRAY OF STRING`	Returns a dynamic array of all keys of the dictionary.
`getLength( ) RETURNS INTEGER`	Returns the number of elements in the dictionary.
`remove( key STRING )`	Removes an element of the dictionary identified by the key.