The documentation states:

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Gets the chance of the main hand item being dropped upon this creature's death.

• A drop chance of 0F will never drop
• A drop chance of 1F will always drop

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I read this as 0x0F-0x1F. Please clarify the documentation by saying 0.0 to 1.0. There is no need to include the 'F' as the type is already visible in the method definition. Or at the very least, make the 'F' lower case and add a decimal in there so it's not confused with hex.