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// Get number of entries.
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int getLength() { return length; }
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// Check if dictionary is of specified type.
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// Look up an entry and return the value. Returns a null object
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// if <key> is not in the dictionary.
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GBool lookupInt(const char *key, const char *alt_key, int *value);
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Object *getVal(int i, Object *obj);
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Object *getValNF(int i, Object *obj);